diff --git a/accounting/grpc/service.pb.go b/accounting/grpc/service.pb.go
index dbb27b1..357547e 100644
--- a/accounting/grpc/service.pb.go
+++ b/accounting/grpc/service.pb.go
@@ -162,7 +162,7 @@ func (x *BalanceResponse) GetVerifyHeader() *grpc.ResponseVerificationHeader {
 	return nil
 }
 
-// To indicate the account for which the balance is requested, it's identifier
+// To indicate the account for which the balance is requested, its identifier
 // is used. It can be any existing account in NeoFS sidechain `Balance` smart
 // contract. If omitted, client implementation MUST set it to the request's
 // signer `OwnerID`.
@@ -216,7 +216,7 @@ func (x *BalanceRequest_Body) GetOwnerId() *grpc1.OwnerID {
 }
 
 // The amount of funds in GAS token for the `OwnerID`'s account requested.
-// Balance is `Decimal` format to avoid precision issues with rounding.
+// Balance is given in the `Decimal` format to avoid precision issues with rounding.
 type BalanceResponse_Body struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
diff --git a/accounting/grpc/service_grpc.pb.go b/accounting/grpc/service_grpc.pb.go
index 8ed1956..7139614 100644
--- a/accounting/grpc/service_grpc.pb.go
+++ b/accounting/grpc/service_grpc.pb.go
@@ -1,8 +1,4 @@
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
-// versions:
-// - protoc-gen-go-grpc v1.2.0
-// - protoc             v3.19.4
-// source: accounting/grpc/service.proto
 
 package accounting
 
diff --git a/accounting/grpc/types.pb.go b/accounting/grpc/types.pb.go
index a36188b..016bdc2 100644
--- a/accounting/grpc/types.pb.go
+++ b/accounting/grpc/types.pb.go
@@ -32,7 +32,7 @@ type Decimal struct {
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	// Number in smallest Token fractions.
+	// Number in the smallest Token fractions.
 	Value int64 `protobuf:"varint,1,opt,name=value,proto3" json:"value,omitempty"`
 	// Precision value indicating how many smallest fractions can be in one
 	// integer.
diff --git a/acl/grpc/types.pb.go b/acl/grpc/types.pb.go
index e71a893..cf8114e 100644
--- a/acl/grpc/types.pb.go
+++ b/acl/grpc/types.pb.go
@@ -29,10 +29,10 @@ const (
 	Role_ROLE_UNSPECIFIED Role = 0
 	// User target rule is applied if sender is the owner of the container
 	Role_USER Role = 1
-	// System target rule is applied if sender is the storage node within the
-	// container or inner ring node
+	// System target rule is applied if sender is a storage node within the
+	// container or an inner ring node
 	Role_SYSTEM Role = 2
-	// Others target rule is applied if sender is not user nor system target
+	// Others target rule is applied if sender is neither a user nor a system target
 	Role_OTHERS Role = 3
 )
 
@@ -394,16 +394,16 @@ func (x *EACLRecord) GetTargets() []*EACLRecord_Target {
 	return nil
 }
 
-// Extended ACL rules table. Defined a list of ACL rules additionally to Basic
-// ACL. Extended ACL rules can be attached to the container and can be updated
+// Extended ACL rules table. A list of ACL rules defined additionally to Basic
+// ACL. Extended ACL rules can be attached to a container and can be updated
 // or may be defined in `BearerToken` structure. Please see the corresponding
-// NeoFS Technical Specification's section for detailed description.
+// NeoFS Technical Specification section for detailed description.
 type EACLTable struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	// eACL format version. Effectively the version of API library used to create
+	// eACL format version. Effectively, the version of API library used to create
 	// eACL Table.
 	Version *grpc.Version `protobuf:"bytes,1,opt,name=version,proto3" json:"version,omitempty"`
 	// Identifier of the container that should use given access control rules
@@ -472,8 +472,8 @@ func (x *EACLTable) GetRecords() []*EACLRecord {
 // used in the similar use cases, like providing authorisation to externally
 // authenticated party.
 //
-// BearerToken can be issued only by container's owner and must be signed using
-// the key associated with container's `OwnerID`.
+// BearerToken can be issued only by the container's owner and must be signed using
+// the key associated with the container's `OwnerID`.
 type BearerToken struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -531,7 +531,7 @@ func (x *BearerToken) GetSignature() *grpc.Signature {
 	return nil
 }
 
-// Filter to check particular properties of the request or object.
+// Filter to check particular properties of the request or the object.
 //
 // By default `key` field refers to the corresponding object's `Attribute`.
 // Some Object's header fields can also be accessed by adding `$Object:`
@@ -695,17 +695,19 @@ func (x *EACLRecord_Target) GetKeys() [][]byte {
 	return nil
 }
 
-// Bearer Token body structure contains Extended ACL table issued by container
-// owner with additional information preventing token's abuse.
+// Bearer Token body structure contains Extended ACL table issued by the container
+// owner with additional information preventing token abuse.
 type BearerToken_Body struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
 	// Table of Extended ACL rules to use instead of the ones attached to the
-	// container
+	// container. If it contains `container_id` field, bearer token is only
+	// valid for this specific container. Otherwise, any container of the same owner
+	// is allowed.
 	EaclTable *EACLTable `protobuf:"bytes,1,opt,name=eacl_table,json=eaclTable,proto3" json:"eacl_table,omitempty"`
-	// `OwnerID` to whom the token was issued. Must match the request
+	// `OwnerID` defines to whom the token was issued. It must match the request
 	// originator's `OwnerID`. If empty, any token bearer will be accepted.
 	OwnerId *grpc.OwnerID `protobuf:"bytes,2,opt,name=owner_id,json=ownerID,proto3" json:"owner_id,omitempty"`
 	// Token expiration and valid time period parameters
diff --git a/audit/grpc/types.pb.go b/audit/grpc/types.pb.go
index 64d3206..e5b3773 100644
--- a/audit/grpc/types.pb.go
+++ b/audit/grpc/types.pb.go
@@ -28,7 +28,7 @@ type DataAuditResult struct {
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	// Data Audit Result format version. Effectively the version of API library
+	// Data Audit Result format version. Effectively, the version of API library
 	// used to report DataAuditResult structure.
 	Version *grpc.Version `protobuf:"bytes,1,opt,name=version,proto3" json:"version,omitempty"`
 	// Epoch number when the Data Audit was conducted
@@ -47,14 +47,14 @@ type DataAuditResult struct {
 	PassSg []*grpc.ObjectID `protobuf:"bytes,8,rep,name=pass_sg,json=passSG,proto3" json:"pass_sg,omitempty"`
 	// List of Storage Groups that failed audit PoR stage
 	FailSg []*grpc.ObjectID `protobuf:"bytes,9,rep,name=fail_sg,json=failSG,proto3" json:"fail_sg,omitempty"`
-	// Number of sampled objects under audit placed in an optimal way according to
+	// Number of sampled objects under the audit placed in an optimal way according to
 	// the containers placement policy when checking PoP
 	Hit uint32 `protobuf:"varint,10,opt,name=hit,proto3" json:"hit,omitempty"`
-	// Number of sampled objects under audit placed in suboptimal way according to
+	// Number of sampled objects under the audit placed in suboptimal way according to
 	// the containers placement policy, but still at a satisfactory level when
 	// checking PoP
 	Miss uint32 `protobuf:"varint,11,opt,name=miss,proto3" json:"miss,omitempty"`
-	// Number of sampled objects under audit stored in a way not confirming
+	// Number of sampled objects under the audit stored inconsistently with the
 	// placement policy or not found at all when checking PoP
 	Fail uint32 `protobuf:"varint,12,opt,name=fail,proto3" json:"fail,omitempty"`
 	// List of storage node public keys that passed at least one PDP
diff --git a/container/grpc/service.pb.go b/container/grpc/service.pb.go
index dd91394..390261e 100644
--- a/container/grpc/service.pb.go
+++ b/container/grpc/service.pb.go
@@ -1069,7 +1069,7 @@ func (x *PutRequest_Body) GetSignature() *grpc1.SignatureRFC6979 {
 // Container put response body contains information about the newly registered
 // container as seen by `Container` smart contract. `ContainerID` can be
 // calculated beforehand from the container structure and compared to the one
-// returned here to make sure everything was done as expected.
+// returned here to make sure everything has been done as expected.
 type PutResponse_Body struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -1118,8 +1118,8 @@ func (x *PutResponse_Body) GetContainerId() *grpc1.ContainerID {
 	return nil
 }
 
-// Container removal request body has a signed `ContainerID` as a proof of
-// container owner's intent. The signature will be verified by `Container`
+// Container removal request body has signed `ContainerID` as a proof of
+// the container owner's intent. The signature will be verified by `Container`
 // smart contract, so signing algorithm must be supported by NeoVM.
 type DeleteRequest_Body struct {
 	state         protoimpl.MessageState
@@ -1268,7 +1268,7 @@ func (x *GetRequest_Body) GetContainerId() *grpc1.ContainerID {
 }
 
 // Get container response body does not have container structure signature. It
-// was already verified on container creation.
+// has been already verified upon container creation.
 type GetResponse_Body struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -1278,7 +1278,7 @@ type GetResponse_Body struct {
 	Container *Container `protobuf:"bytes,1,opt,name=container,proto3" json:"container,omitempty"`
 	// Signature of a stable-marshalled container according to RFC-6979.
 	Signature *grpc1.SignatureRFC6979 `protobuf:"bytes,2,opt,name=signature,proto3" json:"signature,omitempty"`
-	// Session token if the container was created within a session
+	// Session token if the container has been created within the session
 	SessionToken *grpc.SessionToken `protobuf:"bytes,3,opt,name=session_token,json=sessionToken,proto3" json:"session_token,omitempty"`
 }
 
@@ -1440,7 +1440,7 @@ type SetExtendedACLRequest_Body struct {
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	// Extended ACL table to set for container
+	// Extended ACL table to set for the container
 	Eacl *grpc2.EACLTable `protobuf:"bytes,1,opt,name=eacl,proto3" json:"eacl,omitempty"`
 	// Signature of stable-marshalled Extended ACL table according to RFC-6979.
 	Signature *grpc1.SignatureRFC6979 `protobuf:"bytes,2,opt,name=signature,proto3" json:"signature,omitempty"`
@@ -1493,7 +1493,7 @@ func (x *SetExtendedACLRequest_Body) GetSignature() *grpc1.SignatureRFC6979 {
 }
 
 // `SetExtendedACLResponse` has an empty body because the operation is
-// asynchronous and update should be reflected in `Container` smart contract's
+// asynchronous and the update should be reflected in `Container` smart contract's
 // storage after next block is issued in sidechain.
 type SetExtendedACLResponse_Body struct {
 	state         protoimpl.MessageState
@@ -1582,9 +1582,9 @@ func (x *GetExtendedACLRequest_Body) GetContainerId() *grpc1.ContainerID {
 	return nil
 }
 
-// Get Extended ACL Response body can be empty if the requested container did
-// not have Extended ACL Table attached or Extended ACL was not allowed at
-// container creation.
+// Get Extended ACL Response body can be empty if the requested container does
+// not have Extended ACL Table attached or Extended ACL has not been allowed at
+// the time of container creation.
 type GetExtendedACLResponse_Body struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -1657,8 +1657,8 @@ type AnnounceUsedSpaceRequest_Body struct {
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	// List of announcements. If nodes share several containers, then
-	// announcements transferred in a batch.
+	// List of announcements. If nodes share several containers,
+	// announcements are transferred in a batch.
 	Announcements []*AnnounceUsedSpaceRequest_Body_Announcement `protobuf:"bytes,1,rep,name=announcements,proto3" json:"announcements,omitempty"`
 }
 
@@ -1701,17 +1701,17 @@ func (x *AnnounceUsedSpaceRequest_Body) GetAnnouncements() []*AnnounceUsedSpaceR
 	return nil
 }
 
-// Announcement contains used space information about single container.
+// Announcement contains used space information for a single container.
 type AnnounceUsedSpaceRequest_Body_Announcement struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	// Epoch number for which container size estimation was produced.
+	// Epoch number for which the container size estimation was produced.
 	Epoch uint64 `protobuf:"varint,1,opt,name=epoch,proto3" json:"epoch,omitempty"`
 	// Identifier of the container.
 	ContainerId *grpc1.ContainerID `protobuf:"bytes,2,opt,name=container_id,json=containerId,proto3" json:"container_id,omitempty"`
-	// Used space is a sum of object payload sizes of specified
+	// Used space is a sum of object payload sizes of a specified
 	// container, stored in the node. It must not include inhumed objects.
 	UsedSpace uint64 `protobuf:"varint,3,opt,name=used_space,json=usedSpace,proto3" json:"used_space,omitempty"`
 }
diff --git a/container/grpc/service_grpc.pb.go b/container/grpc/service_grpc.pb.go
index cf9c435..ccb2a2b 100644
--- a/container/grpc/service_grpc.pb.go
+++ b/container/grpc/service_grpc.pb.go
@@ -1,8 +1,4 @@
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
-// versions:
-// - protoc-gen-go-grpc v1.2.0
-// - protoc             v3.19.4
-// source: container/grpc/service.proto
 
 package container
 
@@ -24,7 +20,7 @@ const _ = grpc.SupportPackageIsVersion7
 type ContainerServiceClient interface {
 	// `Put` invokes `Container` smart contract's `Put` method and returns
 	// response immediately. After a new block is issued in sidechain, request is
-	// verified by Inner Ring nodes. After one more block in sidechain, container
+	// verified by Inner Ring nodes. After one more block in sidechain, the container
 	// is added into smart contract storage.
 	//
 	// Statuses:
@@ -34,7 +30,7 @@ type ContainerServiceClient interface {
 	Put(ctx context.Context, in *PutRequest, opts ...grpc.CallOption) (*PutResponse, error)
 	// `Delete` invokes `Container` smart contract's `Delete` method and returns
 	// response immediately. After a new block is issued in sidechain, request is
-	// verified by Inner Ring nodes. After one more block in sidechain, container
+	// verified by Inner Ring nodes. After one more block in sidechain, the container
 	// is added into smart contract storage.
 	//
 	// Statuses:
@@ -59,7 +55,7 @@ type ContainerServiceClient interface {
 	// - Common failures (SECTION_FAILURE_COMMON).
 	List(ctx context.Context, in *ListRequest, opts ...grpc.CallOption) (*ListResponse, error)
 	// Invokes 'SetEACL' method of 'Container` smart contract and returns response
-	// immediately. After one more block in sidechain, Extended ACL changes are
+	// immediately. After one more block in sidechain, changes in an Extended ACL are
 	// added into smart contract storage.
 	//
 	// Statuses:
@@ -77,7 +73,7 @@ type ContainerServiceClient interface {
 	// - **CONTAINER_NOT_FOUND** (3072, SECTION_CONTAINER): \
 	//   container not found.
 	GetExtendedACL(ctx context.Context, in *GetExtendedACLRequest, opts ...grpc.CallOption) (*GetExtendedACLResponse, error)
-	// Announce container used space values for P2P synchronization.
+	// Announces the space values used by the container for P2P synchronization.
 	//
 	// Statuses:
 	// - **OK** (0, SECTION_SUCCESS): \
@@ -163,7 +159,7 @@ func (c *containerServiceClient) AnnounceUsedSpace(ctx context.Context, in *Anno
 type ContainerServiceServer interface {
 	// `Put` invokes `Container` smart contract's `Put` method and returns
 	// response immediately. After a new block is issued in sidechain, request is
-	// verified by Inner Ring nodes. After one more block in sidechain, container
+	// verified by Inner Ring nodes. After one more block in sidechain, the container
 	// is added into smart contract storage.
 	//
 	// Statuses:
@@ -173,7 +169,7 @@ type ContainerServiceServer interface {
 	Put(context.Context, *PutRequest) (*PutResponse, error)
 	// `Delete` invokes `Container` smart contract's `Delete` method and returns
 	// response immediately. After a new block is issued in sidechain, request is
-	// verified by Inner Ring nodes. After one more block in sidechain, container
+	// verified by Inner Ring nodes. After one more block in sidechain, the container
 	// is added into smart contract storage.
 	//
 	// Statuses:
@@ -198,7 +194,7 @@ type ContainerServiceServer interface {
 	// - Common failures (SECTION_FAILURE_COMMON).
 	List(context.Context, *ListRequest) (*ListResponse, error)
 	// Invokes 'SetEACL' method of 'Container` smart contract and returns response
-	// immediately. After one more block in sidechain, Extended ACL changes are
+	// immediately. After one more block in sidechain, changes in an Extended ACL are
 	// added into smart contract storage.
 	//
 	// Statuses:
@@ -216,7 +212,7 @@ type ContainerServiceServer interface {
 	// - **CONTAINER_NOT_FOUND** (3072, SECTION_CONTAINER): \
 	//   container not found.
 	GetExtendedACL(context.Context, *GetExtendedACLRequest) (*GetExtendedACLResponse, error)
-	// Announce container used space values for P2P synchronization.
+	// Announces the space values used by the container for P2P synchronization.
 	//
 	// Statuses:
 	// - **OK** (0, SECTION_SUCCESS): \
diff --git a/container/grpc/types.pb.go b/container/grpc/types.pb.go
index 3e2ed0d..269cfb4 100644
--- a/container/grpc/types.pb.go
+++ b/container/grpc/types.pb.go
@@ -24,22 +24,22 @@ const (
 
 // Container is a structure that defines object placement behaviour. Objects can
 // be stored only within containers. They define placement rule, attributes and
-// access control information. ID of the container is a 32 byte long SHA256 hash
+// access control information. An ID of a container is a 32 byte long SHA256 hash
 // of stable-marshalled container message.
 type Container struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	// Container format version. Effectively the version of API library used to
-	// create container.
+	// Container format version. Effectively, the version of API library used to
+	// create the container.
 	Version *grpc.Version `protobuf:"bytes,1,opt,name=version,proto3" json:"version,omitempty"`
 	// Identifier of the container owner
 	OwnerId *grpc.OwnerID `protobuf:"bytes,2,opt,name=owner_id,json=ownerID,proto3" json:"owner_id,omitempty"`
 	// Nonce is a 16 byte UUIDv4, used to avoid collisions of `ContainerID`s
 	Nonce []byte `protobuf:"bytes,3,opt,name=nonce,proto3" json:"nonce,omitempty"`
-	// `BasicACL` contains access control rules for owner, system, others groups
-	// and permission bits for `BearerToken` and `Extended ACL`
+	// `BasicACL` contains access control rules for the owner, system and others groups,
+	// as well as permission bits for `BearerToken` and `Extended ACL`
 	BasicAcl uint32 `protobuf:"varint,4,opt,name=basic_acl,json=basicACL,proto3" json:"basic_acl,omitempty"`
 	// Attributes represent immutable container's meta data
 	Attributes []*Container_Attribute `protobuf:"bytes,5,rep,name=attributes,proto3" json:"attributes,omitempty"`
@@ -122,8 +122,8 @@ func (x *Container) GetPlacementPolicy() *grpc1.PlacementPolicy {
 }
 
 // `Attribute` is a user-defined Key-Value metadata pair attached to the
-// container. Container attributes are immutable. They are set at container
-// creation and can never be added or updated.
+// container. Container attributes are immutable. They are set at the moment of
+// container creation and can never be added or updated.
 //
 // Key name must be a container-unique valid UTF-8 string. Value can't be
 // empty. Containers with duplicated attribute names or attributes with empty
@@ -132,14 +132,20 @@ func (x *Container) GetPlacementPolicy() *grpc1.PlacementPolicy {
 // There are some "well-known" attributes affecting system behaviour:
 //
 // * __NEOFS__SUBNET \
-//   String ID of container's storage subnet. Container can be attached to
-//   only one subnet.
+//   String ID of a container's storage subnet. Any container can be attached to
+//   one subnet only.
 // * __NEOFS__NAME \
-//   String of human-friendly container name registered as the domain in
+//   String of a human-friendly container name registered as a domain in
 //   NNS contract.
 // * __NEOFS__ZONE \
-//   String of zone for `__NEOFS__NAME`. Used as TLD of domain name in NNS
-//   contract. If zone is not specified, use default zone: `container`.
+//   String of a zone for `__NEOFS__NAME`. Used as a TLD of a domain name in NNS
+//   contract. If no zone is specified, use default zone: `container`.
+// * __NEOFS__DISABLE_HOMOMORPHIC_HASHING \
+//   Disables homomorphic hashing for the container if the value equals "true" string.
+//   Any other values are interpreted as missing attribute. Container could be
+//   accepted in a NeoFS network only if the global network hashing configuration
+//   value corresponds with that attribute's value. After container inclusion, network
+//   setting is ignored.
 //
 // And some well-known attributes used by applications only:
 //
diff --git a/lock/grpc/types.pb.go b/lock/grpc/types.pb.go
index 046249d..0a560ec 100644
--- a/lock/grpc/types.pb.go
+++ b/lock/grpc/types.pb.go
@@ -21,9 +21,10 @@ const (
 	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
 )
 
-// Lock objects protects a list of objects from being deleted. Lifetime of the
+// Lock objects protects a list of objects from being deleted. The lifetime of a
 // lock object is limited similar to regular objects in
-// `__NEOFS__EXPIRATION_EPOCH` attribute.
+// `__NEOFS__EXPIRATION_EPOCH` attribute. Lock object MUST have expiration epoch.
+// It is impossible to delete a lock object via ObjectService.Delete RPC call.
 type Lock struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
diff --git a/netmap/grpc/service.pb.go b/netmap/grpc/service.pb.go
index 670afc7..93b19ba 100644
--- a/netmap/grpc/service.pb.go
+++ b/netmap/grpc/service.pb.go
@@ -22,7 +22,7 @@ const (
 	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
 )
 
-// Get NodeInfo structure from the particular node directly
+// Get NodeInfo structure directly from a particular node
 type LocalNodeInfoRequest struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -162,7 +162,7 @@ func (x *LocalNodeInfoResponse) GetVerifyHeader() *grpc.ResponseVerificationHead
 	return nil
 }
 
-// Get NetworkInfo structure with the network view from particular node.
+// Get NetworkInfo structure with the network view from a particular node.
 type NetworkInfoRequest struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
diff --git a/netmap/grpc/service_grpc.pb.go b/netmap/grpc/service_grpc.pb.go
index e8e5be4..90b598c 100644
--- a/netmap/grpc/service_grpc.pb.go
+++ b/netmap/grpc/service_grpc.pb.go
@@ -1,8 +1,4 @@
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
-// versions:
-// - protoc-gen-go-grpc v1.2.0
-// - protoc             v3.19.4
-// source: netmap/grpc/service.proto
 
 package netmap
 
@@ -22,11 +18,11 @@ const _ = grpc.SupportPackageIsVersion7
 //
 // For semantics around ctx use and closing/ending streaming RPCs, please refer to https://pkg.go.dev/google.golang.org/grpc/?tab=doc#ClientConn.NewStream.
 type NetmapServiceClient interface {
-	// Get NodeInfo structure from the particular node directly. Node information
-	// can be taken from `Netmap` smart contract, but in some cases the one may
-	// want to get recent information directly, or to talk to the node not yet
-	// present in `Network Map` to find out what API version can be used for
-	// further communication. Can also be used to check if node is up and running.
+	// Get NodeInfo structure from the particular node directly.
+	// Node information can be taken from `Netmap` smart contract. In some cases, though,
+	// one may want to get recent information directly or to talk to the node not yet
+	// present in the `Network Map` to find out what API version can be used for
+	// further communication. This can be also used to check if a node is up and running.
 	//
 	// Statuses:
 	// - **OK** (0, SECTION_SUCCESS):
@@ -72,11 +68,11 @@ func (c *netmapServiceClient) NetworkInfo(ctx context.Context, in *NetworkInfoRe
 // All implementations should embed UnimplementedNetmapServiceServer
 // for forward compatibility
 type NetmapServiceServer interface {
-	// Get NodeInfo structure from the particular node directly. Node information
-	// can be taken from `Netmap` smart contract, but in some cases the one may
-	// want to get recent information directly, or to talk to the node not yet
-	// present in `Network Map` to find out what API version can be used for
-	// further communication. Can also be used to check if node is up and running.
+	// Get NodeInfo structure from the particular node directly.
+	// Node information can be taken from `Netmap` smart contract. In some cases, though,
+	// one may want to get recent information directly or to talk to the node not yet
+	// present in the `Network Map` to find out what API version can be used for
+	// further communication. This can be also used to check if a node is up and running.
 	//
 	// Statuses:
 	// - **OK** (0, SECTION_SUCCESS):
diff --git a/netmap/grpc/types.pb.go b/netmap/grpc/types.pb.go
index 4f7b976..53c601d 100644
--- a/netmap/grpc/types.pb.go
+++ b/netmap/grpc/types.pb.go
@@ -104,7 +104,7 @@ func (Operation) EnumDescriptor() ([]byte, []int) {
 type Clause int32
 
 const (
-	// No modifier defined. Will select nodes from bucket randomly.
+	// No modifier defined. Nodes will be selected from the bucket randomly
 	Clause_CLAUSE_UNSPECIFIED Clause = 0
 	// SAME will select only nodes having the same value of bucket attribute
 	Clause_SAME Clause = 1
@@ -206,14 +206,14 @@ func (NodeInfo_State) EnumDescriptor() ([]byte, []int) {
 	return file_netmap_grpc_types_proto_rawDescGZIP(), []int{4, 0}
 }
 
-// Filter will return the subset of nodes from `NetworkMap` or another filter's
-// results, that will satisfy filter's conditions.
+// This filter will return the subset of nodes from `NetworkMap` or another filter's
+// results that will satisfy filter's conditions.
 type Filter struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	// Name of the filter or a reference to the named filter. '*' means
+	// Name of the filter or a reference to a named filter. '*' means
 	// application to the whole unfiltered NetworkMap. At top level it's used as a
 	// filter name. At lower levels it's considered to be a reference to another
 	// named filter
@@ -309,7 +309,7 @@ type Selector struct {
 	Count uint32 `protobuf:"varint,2,opt,name=count,proto3" json:"count,omitempty"`
 	// Selector modifier showing how to form a bucket
 	Clause Clause `protobuf:"varint,3,opt,name=clause,proto3,enum=neo.fs.v2.netmap.Clause" json:"clause,omitempty"`
-	// Attribute bucket to select from
+	// Bucket attribute to select from
 	Attribute string `protobuf:"bytes,4,opt,name=attribute,proto3" json:"attribute,omitempty"`
 	// Filter reference to select from
 	Filter string `protobuf:"bytes,5,opt,name=filter,proto3" json:"filter,omitempty"`
@@ -383,7 +383,7 @@ func (x *Selector) GetFilter() string {
 }
 
 // Number of object replicas in a set of nodes from the defined selector. If no
-// selector set the root bucket containing all possible nodes will be used by
+// selector set, the root bucket containing all possible nodes will be used by
 // default.
 type Replica struct {
 	state         protoimpl.MessageState
@@ -805,7 +805,7 @@ func (x *NetworkInfo) GetNetworkConfig() *NetworkConfig {
 //   automatically from `UN-LOCODE` attribute.
 //
 // For detailed description of each well-known attribute please see the
-// corresponding section in NeoFS Technical specification.
+// corresponding section in NeoFS Technical Specification.
 type NodeInfo_Attribute struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
diff --git a/object/grpc/service.pb.go b/object/grpc/service.pb.go
index f75b580..b282895 100644
--- a/object/grpc/service.pb.go
+++ b/object/grpc/service.pb.go
@@ -513,12 +513,12 @@ func (x *HeadRequest) GetVerifyHeader() *grpc.RequestVerificationHeader {
 	return nil
 }
 
-// Tuple of full object header and signature of `ObjectID`. \
+// Tuple of a full object header and signature of an `ObjectID`. \
 // Signed `ObjectID` is present to verify full header's authenticity through the
 // following steps:
 //
-// 1. Calculate `SHA-256` of marshalled `Header` structure
-// 2. Check if the resulting hash matched `ObjectID`
+// 1. Calculate `SHA-256` of the marshalled `Header` structure
+// 2. Check if the resulting hash matches `ObjectID`
 // 3. Check if `ObjectID` signature in `signature` field is correct
 type HeaderWithSignature struct {
 	state         protoimpl.MessageState
@@ -1898,13 +1898,13 @@ func (x *SearchRequest_Body) GetFilters() []*SearchRequest_Body_Filter {
 	return nil
 }
 
-// Filter structure checks if object header field or attribute content
+// Filter structure checks if the object header field or the attribute content
 // matches a value.
 //
-// If no filters set, search request will return all objects of the
+// If no filters are set, search request will return all objects of the
 // container, including Regular object, Tombstones and Storage Group
 // objects. Most human users expect to get only object they can directly
-// work with. In that case the `$Object:ROOT` filter should be used.
+// work with. In that case, `$Object:ROOT` filter should be used.
 //
 // By default `key` field refers to the corresponding object's `Attribute`.
 // Some Object's header fields can also be accessed by adding `$Object:`
@@ -1937,10 +1937,10 @@ func (x *SearchRequest_Body) GetFilters() []*SearchRequest_Body_Filter {
 // properties:
 //
 // * $Object:ROOT \
-//   Returns only `REGULAR` type objects that are not split or are the top
+//   Returns only `REGULAR` type objects that are not split or that are the top
 //   level root objects in a split hierarchy. This includes objects not
 //   present physically, like large objects split into smaller objects
-//   without separate top-level root object. Other type objects like
+//   without a separate top-level root object. Objects of other types like
 //   StorageGroups and Tombstones will not be shown. This filter may be
 //   useful for listing objects like `ls` command of some virtual file
 //   system. This filter is activated if the `key` exists, disregarding the
diff --git a/object/grpc/service_grpc.pb.go b/object/grpc/service_grpc.pb.go
index 376d95d..ba4b958 100644
--- a/object/grpc/service_grpc.pb.go
+++ b/object/grpc/service_grpc.pb.go
@@ -1,8 +1,4 @@
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
-// versions:
-// - protoc-gen-go-grpc v1.2.0
-// - protoc             v3.19.4
-// source: object/grpc/service.proto
 
 package object
 
@@ -23,11 +19,22 @@ const _ = grpc.SupportPackageIsVersion7
 // For semantics around ctx use and closing/ending streaming RPCs, please refer to https://pkg.go.dev/google.golang.org/grpc/?tab=doc#ClientConn.NewStream.
 type ObjectServiceClient interface {
 	// Receive full object structure, including Headers and payload. Response uses
-	// gRPC stream. First response message carries object with requested address.
+	// gRPC stream. First response message carries the object with the requested address.
 	// Chunk messages are parts of the object's payload if it is needed. All
-	// messages, except the first one, carry payload chunks. Requested object can
+	// messages, except the first one, carry payload chunks. The requested object can
 	// be restored by concatenation of object message payload and all chunks
-	// keeping receiving order.
+	// keeping the receiving order.
+	//
+	// Extended headers can change `Get` behaviour:
+	// * __NEOFS__NETMAP_EPOCH \
+	//   Will use the requsted version of Network Map for object placement
+	//   calculation.
+	// * __NEOFS__NETMAP_LOOKUP_DEPTH \
+	//   Will try older versions (starting from `__NEOFS__NETMAP_EPOCH` if specified or
+	//   the latest one otherwise) of Network Map to find an object until the depth
+	//   limit is reached.
+	//
+	// Please refer to detailed `XHeader` description.
 	//
 	// Statuses:
 	// - **OK** (0, SECTION_SUCCESS): \
@@ -49,7 +56,14 @@ type ObjectServiceClient interface {
 	// SHOULD be set. Session token SHOULD be obtained before `PUT` operation (see
 	// session package). Chunk messages are considered by server as a part of an
 	// object payload. All messages, except first one, SHOULD be payload chunks.
-	// Chunk messages SHOULD be sent in direct order of fragmentation.
+	// Chunk messages SHOULD be sent in the direct order of fragmentation.
+	//
+	// Extended headers can change `Put` behaviour:
+	// * __NEOFS__NETMAP_EPOCH \
+	//   Will use the requsted version of Network Map for object placement
+	//   calculation.
+	//
+	// Please refer to detailed `XHeader` description.
 	//
 	// Statuses:
 	// - **OK** (0, SECTION_SUCCESS): \
@@ -74,6 +88,13 @@ type ObjectServiceClient interface {
 	// Delete the object from a container. There is no immediate removal
 	// guarantee. Object will be marked for removal and deleted eventually.
 	//
+	// Extended headers can change `Delete` behaviour:
+	// * __NEOFS__NETMAP_EPOCH \
+	//   Will use the requsted version of Network Map for object placement
+	//   calculation.
+	//
+	// Please refer to detailed `XHeader` description.
+	//
 	// Statuses:
 	// - **OK** (0, SECTION_SUCCESS): \
 	//   object has been successfully marked to be removed from the container;
@@ -89,7 +110,14 @@ type ObjectServiceClient interface {
 	Delete(ctx context.Context, in *DeleteRequest, opts ...grpc.CallOption) (*DeleteResponse, error)
 	// Returns the object Headers without data payload. By default full header is
 	// returned. If `main_only` request field is set, the short header with only
-	// the very minimal information would be returned instead.
+	// the very minimal information will be returned instead.
+	//
+	// Extended headers can change `Head` behaviour:
+	// * __NEOFS__NETMAP_EPOCH \
+	//   Will use the requsted version of Network Map for object placement
+	//   calculation.
+	//
+	// Please refer to detailed `XHeader` description.
 	//
 	// Statuses:
 	// - **OK** (0, SECTION_SUCCESS): \
@@ -110,6 +138,13 @@ type ObjectServiceClient interface {
 	// Header's filed values. Please see the corresponding NeoFS Technical
 	// Specification section for more details.
 	//
+	// Extended headers can change `Search` behaviour:
+	// * __NEOFS__NETMAP_EPOCH \
+	//   Will use the requsted version of Network Map for object placement
+	//   calculation.
+	//
+	// Please refer to detailed `XHeader` description.
+	//
 	// Statuses:
 	// - **OK** (0, SECTION_SUCCESS): \
 	//   objects have been successfully selected;
@@ -123,9 +158,19 @@ type ObjectServiceClient interface {
 	Search(ctx context.Context, in *SearchRequest, opts ...grpc.CallOption) (ObjectService_SearchClient, error)
 	// Get byte range of data payload. Range is set as an (offset, length) tuple.
 	// Like in `Get` method, the response uses gRPC stream. Requested range can be
-	// restored by concatenation of all received payload chunks keeping receiving
+	// restored by concatenation of all received payload chunks keeping the receiving
 	// order.
 	//
+	// Extended headers can change `GetRange` behaviour:
+	// * __NEOFS__NETMAP_EPOCH \
+	//   Will use the requsted version of Network Map for object placement
+	//   calculation.
+	// * __NEOFS__NETMAP_LOOKUP_DEPTH \
+	//   Will try older versions of Network Map to find an object until the depth
+	//   limit is reached.
+	//
+	// Please refer to detailed `XHeader` description.
+	//
 	// Statuses:
 	// - **OK** (0, SECTION_SUCCESS): \
 	//   data range of the object payload has been successfully read;
@@ -140,11 +185,23 @@ type ObjectServiceClient interface {
 	//   provided session token has expired;
 	// - **OBJECT_ALREADY_REMOVED** (2052, SECTION_OBJECT): \
 	//   the requested object has been marked as deleted.
+	// - **OUT_OF_RANGE** (2053, SECTION_OBJECT): \
+	//   the requested range is out of bounds.
 	GetRange(ctx context.Context, in *GetRangeRequest, opts ...grpc.CallOption) (ObjectService_GetRangeClient, error)
 	// Returns homomorphic or regular hash of object's payload range after
 	// applying XOR operation with the provided `salt`. Ranges are set of (offset,
-	// length) tuples. Hashes order in response corresponds to ranges order in
-	// request. Note that hash is calculated for XORed data.
+	// length) tuples. Hashes order in response corresponds to the ranges order in
+	// the request. Note that hash is calculated for XORed data.
+	//
+	// Extended headers can change `GetRangeHash` behaviour:
+	// * __NEOFS__NETMAP_EPOCH \
+	//   Will use the requsted version of Network Map for object placement
+	//   calculation.
+	// * __NEOFS__NETMAP_LOOKUP_DEPTH \
+	//   Will try older versions of Network Map to find an object until the depth
+	//   limit is reached.
+	//
+	// Please refer to detailed `XHeader` description.
 	//
 	// Statuses:
 	// - **OK** (0, SECTION_SUCCESS): \
@@ -156,6 +213,8 @@ type ObjectServiceClient interface {
 	//   access to operation RANGEHASH of the object is denied;
 	// - **OBJECT_NOT_FOUND** (2049, SECTION_OBJECT): \
 	//   object not found in container;
+	// - **OUT_OF_RANGE** (2053, SECTION_OBJECT): \
+	//   the requested range is out of bounds.
 	// - **TOKEN_EXPIRED** (4097, SECTION_SESSION): \
 	//   provided session token has expired.
 	GetRangeHash(ctx context.Context, in *GetRangeHashRequest, opts ...grpc.CallOption) (*GetRangeHashResponse, error)
@@ -331,11 +390,22 @@ func (c *objectServiceClient) GetRangeHash(ctx context.Context, in *GetRangeHash
 // for forward compatibility
 type ObjectServiceServer interface {
 	// Receive full object structure, including Headers and payload. Response uses
-	// gRPC stream. First response message carries object with requested address.
+	// gRPC stream. First response message carries the object with the requested address.
 	// Chunk messages are parts of the object's payload if it is needed. All
-	// messages, except the first one, carry payload chunks. Requested object can
+	// messages, except the first one, carry payload chunks. The requested object can
 	// be restored by concatenation of object message payload and all chunks
-	// keeping receiving order.
+	// keeping the receiving order.
+	//
+	// Extended headers can change `Get` behaviour:
+	// * __NEOFS__NETMAP_EPOCH \
+	//   Will use the requsted version of Network Map for object placement
+	//   calculation.
+	// * __NEOFS__NETMAP_LOOKUP_DEPTH \
+	//   Will try older versions (starting from `__NEOFS__NETMAP_EPOCH` if specified or
+	//   the latest one otherwise) of Network Map to find an object until the depth
+	//   limit is reached.
+	//
+	// Please refer to detailed `XHeader` description.
 	//
 	// Statuses:
 	// - **OK** (0, SECTION_SUCCESS): \
@@ -357,7 +427,14 @@ type ObjectServiceServer interface {
 	// SHOULD be set. Session token SHOULD be obtained before `PUT` operation (see
 	// session package). Chunk messages are considered by server as a part of an
 	// object payload. All messages, except first one, SHOULD be payload chunks.
-	// Chunk messages SHOULD be sent in direct order of fragmentation.
+	// Chunk messages SHOULD be sent in the direct order of fragmentation.
+	//
+	// Extended headers can change `Put` behaviour:
+	// * __NEOFS__NETMAP_EPOCH \
+	//   Will use the requsted version of Network Map for object placement
+	//   calculation.
+	//
+	// Please refer to detailed `XHeader` description.
 	//
 	// Statuses:
 	// - **OK** (0, SECTION_SUCCESS): \
@@ -382,6 +459,13 @@ type ObjectServiceServer interface {
 	// Delete the object from a container. There is no immediate removal
 	// guarantee. Object will be marked for removal and deleted eventually.
 	//
+	// Extended headers can change `Delete` behaviour:
+	// * __NEOFS__NETMAP_EPOCH \
+	//   Will use the requsted version of Network Map for object placement
+	//   calculation.
+	//
+	// Please refer to detailed `XHeader` description.
+	//
 	// Statuses:
 	// - **OK** (0, SECTION_SUCCESS): \
 	//   object has been successfully marked to be removed from the container;
@@ -397,7 +481,14 @@ type ObjectServiceServer interface {
 	Delete(context.Context, *DeleteRequest) (*DeleteResponse, error)
 	// Returns the object Headers without data payload. By default full header is
 	// returned. If `main_only` request field is set, the short header with only
-	// the very minimal information would be returned instead.
+	// the very minimal information will be returned instead.
+	//
+	// Extended headers can change `Head` behaviour:
+	// * __NEOFS__NETMAP_EPOCH \
+	//   Will use the requsted version of Network Map for object placement
+	//   calculation.
+	//
+	// Please refer to detailed `XHeader` description.
 	//
 	// Statuses:
 	// - **OK** (0, SECTION_SUCCESS): \
@@ -418,6 +509,13 @@ type ObjectServiceServer interface {
 	// Header's filed values. Please see the corresponding NeoFS Technical
 	// Specification section for more details.
 	//
+	// Extended headers can change `Search` behaviour:
+	// * __NEOFS__NETMAP_EPOCH \
+	//   Will use the requsted version of Network Map for object placement
+	//   calculation.
+	//
+	// Please refer to detailed `XHeader` description.
+	//
 	// Statuses:
 	// - **OK** (0, SECTION_SUCCESS): \
 	//   objects have been successfully selected;
@@ -431,9 +529,19 @@ type ObjectServiceServer interface {
 	Search(*SearchRequest, ObjectService_SearchServer) error
 	// Get byte range of data payload. Range is set as an (offset, length) tuple.
 	// Like in `Get` method, the response uses gRPC stream. Requested range can be
-	// restored by concatenation of all received payload chunks keeping receiving
+	// restored by concatenation of all received payload chunks keeping the receiving
 	// order.
 	//
+	// Extended headers can change `GetRange` behaviour:
+	// * __NEOFS__NETMAP_EPOCH \
+	//   Will use the requsted version of Network Map for object placement
+	//   calculation.
+	// * __NEOFS__NETMAP_LOOKUP_DEPTH \
+	//   Will try older versions of Network Map to find an object until the depth
+	//   limit is reached.
+	//
+	// Please refer to detailed `XHeader` description.
+	//
 	// Statuses:
 	// - **OK** (0, SECTION_SUCCESS): \
 	//   data range of the object payload has been successfully read;
@@ -448,11 +556,23 @@ type ObjectServiceServer interface {
 	//   provided session token has expired;
 	// - **OBJECT_ALREADY_REMOVED** (2052, SECTION_OBJECT): \
 	//   the requested object has been marked as deleted.
+	// - **OUT_OF_RANGE** (2053, SECTION_OBJECT): \
+	//   the requested range is out of bounds.
 	GetRange(*GetRangeRequest, ObjectService_GetRangeServer) error
 	// Returns homomorphic or regular hash of object's payload range after
 	// applying XOR operation with the provided `salt`. Ranges are set of (offset,
-	// length) tuples. Hashes order in response corresponds to ranges order in
-	// request. Note that hash is calculated for XORed data.
+	// length) tuples. Hashes order in response corresponds to the ranges order in
+	// the request. Note that hash is calculated for XORed data.
+	//
+	// Extended headers can change `GetRangeHash` behaviour:
+	// * __NEOFS__NETMAP_EPOCH \
+	//   Will use the requsted version of Network Map for object placement
+	//   calculation.
+	// * __NEOFS__NETMAP_LOOKUP_DEPTH \
+	//   Will try older versions of Network Map to find an object until the depth
+	//   limit is reached.
+	//
+	// Please refer to detailed `XHeader` description.
 	//
 	// Statuses:
 	// - **OK** (0, SECTION_SUCCESS): \
@@ -464,6 +584,8 @@ type ObjectServiceServer interface {
 	//   access to operation RANGEHASH of the object is denied;
 	// - **OBJECT_NOT_FOUND** (2049, SECTION_OBJECT): \
 	//   object not found in container;
+	// - **OUT_OF_RANGE** (2053, SECTION_OBJECT): \
+	//   the requested range is out of bounds.
 	// - **TOKEN_EXPIRED** (4097, SECTION_SESSION): \
 	//   provided session token has expired.
 	GetRangeHash(context.Context, *GetRangeHashRequest) (*GetRangeHashResponse, error)
diff --git a/object/grpc/types.pb.go b/object/grpc/types.pb.go
index 6263a06..83a37ba 100644
--- a/object/grpc/types.pb.go
+++ b/object/grpc/types.pb.go
@@ -23,7 +23,7 @@ const (
 )
 
 // Type of the object payload content. Only `REGULAR` type objects can be split,
-// hence `TOMBSTONE`, `STORAGE_GROUP` and `LOCK` payload is limited by maximal
+// hence `TOMBSTONE`, `STORAGE_GROUP` and `LOCK` payload is limited by the maximum
 // object size.
 //
 // String presentation of object type is the same as definition:
@@ -154,7 +154,7 @@ type ShortHeader struct {
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	// Object format version. Effectively the version of API library used to
+	// Object format version. Effectively, the version of API library used to
 	// create particular object.
 	Version *grpc.Version `protobuf:"bytes,1,opt,name=version,proto3" json:"version,omitempty"`
 	// Epoch when the object was created
@@ -259,7 +259,7 @@ type Header struct {
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	// Object format version. Effectively the version of API library used to
+	// Object format version. Effectively, the version of API library used to
 	// create particular object
 	Version *grpc.Version `protobuf:"bytes,1,opt,name=version,proto3" json:"version,omitempty"`
 	// Object's container
@@ -396,8 +396,8 @@ func (x *Header) GetSplit() *Header_Split {
 }
 
 // Object structure. Object is immutable and content-addressed. It means
-// `ObjectID` will change if header or payload changes. It's calculated as a
-// hash of header field, which contains hash of object's payload.
+// `ObjectID` will change if the header or the payload changes. It's calculated as a
+// hash of header field which contains hash of the object's payload.
 //
 // For non-regular object types payload format depends on object type specified
 // in the header.
@@ -476,10 +476,10 @@ func (x *Object) GetPayload() []byte {
 	return nil
 }
 
-// Meta information of split hierarchy for object assembly. With last part
-// one can traverse linked list of split hierarchy back to first part and
-// assemble original object. With linking object one can assembly object
-// straight away from the object parts.
+// Meta information of split hierarchy for object assembly. With the last part
+// one can traverse linked list of split hierarchy back to the first part and
+// assemble the original object. With a linking object one can assemble an object
+// right from the object parts.
 type SplitInfo struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -487,11 +487,11 @@ type SplitInfo struct {
 
 	// 16 byte UUID used to identify the split object hierarchy parts.
 	SplitId []byte `protobuf:"bytes,1,opt,name=split_id,json=splitId,proto3" json:"split_id,omitempty"`
-	// Identifier of the last object in split hierarchy parts. It contains
-	// split header with original object header.
+	// The identifier of the last object in split hierarchy parts. It contains
+	// split header with the original object header.
 	LastPart *grpc.ObjectID `protobuf:"bytes,2,opt,name=last_part,json=lastPart,proto3" json:"last_part,omitempty"`
-	// Identifier of linking object for split hierarchy parts. It contains
-	// split header with original object header and sorted list of
+	// The identifier of a linking object for split hierarchy parts. It contains
+	// split header with the original object header and a sorted list of
 	// object parts.
 	Link *grpc.ObjectID `protobuf:"bytes,3,opt,name=link,proto3" json:"link,omitempty"`
 }
@@ -549,10 +549,10 @@ func (x *SplitInfo) GetLink() *grpc.ObjectID {
 	return nil
 }
 
-// `Attribute` is a user-defined Key-Value metadata pair attached to the
+// `Attribute` is a user-defined Key-Value metadata pair attached to an
 // object.
 //
-// Key name must be a object-unique valid UTF-8 string. Value can't be empty.
+// Key name must be an object-unique valid UTF-8 string. Value can't be empty.
 // Objects with duplicated attribute names or attributes with empty values
 // will be considered invalid.
 //
@@ -583,7 +583,7 @@ func (x *SplitInfo) GetLink() *grpc.ObjectID {
 //   MIME Content Type of object's payload
 //
 // For detailed description of each well-known attribute please see the
-// corresponding section in NeoFS Technical specification.
+// corresponding section in NeoFS Technical Specification.
 type Header_Attribute struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
diff --git a/refs/grpc/types.pb.go b/refs/grpc/types.pb.go
index 96f6285..4c19bab 100644
--- a/refs/grpc/types.pb.go
+++ b/refs/grpc/types.pb.go
@@ -124,7 +124,7 @@ func (ChecksumType) EnumDescriptor() ([]byte, []int) {
 
 // Objects in NeoFS are addressed by their ContainerID and ObjectID.
 //
-// String presentation of `Address` is the concatenation of string encoded
+// String presentation of `Address` is a concatenation of string encoded
 // `ContainerID` and `ObjectID` delimited by '/' character.
 type Address struct {
 	state         protoimpl.MessageState
@@ -184,17 +184,17 @@ func (x *Address) GetObjectId() *ObjectID {
 }
 
 // NeoFS Object unique identifier. Objects are immutable and content-addressed.
-// It means `ObjectID` will change if `header` or `payload` changes.
+// It means `ObjectID` will change if the `header` or the `payload` changes.
 //
 // `ObjectID` is a 32 byte long
 // [SHA256](https://csrc.nist.gov/publications/detail/fips/180/4/final) hash of
-// object's `header` field, which, in it's turn, contains hash of object's
+// the object's `header` field, which, in it's turn, contains the hash of the object's
 // payload.
 //
-// String presentation is
+// String presentation is a
 // [base58](https://tools.ietf.org/html/draft-msporny-base58-02) encoded string.
 //
-// JSON value will be the data encoded as a string using standard base64
+// JSON value will be data encoded as a string using standard base64
 // encoding with paddings. Either
 // [standard](https://tools.ietf.org/html/rfc4648#section-4) or
 // [URL-safe](https://tools.ietf.org/html/rfc4648#section-5) base64 encoding
@@ -254,10 +254,10 @@ func (x *ObjectID) GetValue() []byte {
 // [SHA256](https://csrc.nist.gov/publications/detail/fips/180/4/final) hash of
 // stable-marshalled container message.
 //
-// String presentation is
+// String presentation is a
 // [base58](https://tools.ietf.org/html/draft-msporny-base58-02) encoded string.
 //
-// JSON value will be the data encoded as a string using standard base64
+// JSON value will be data encoded as a string using standard base64
 // encoding with paddings. Either
 // [standard](https://tools.ietf.org/html/rfc4648#section-4) or
 // [URL-safe](https://tools.ietf.org/html/rfc4648#section-5) base64 encoding
@@ -317,10 +317,10 @@ func (x *ContainerID) GetValue() []byte {
 // `OwnerID` is a 25 bytes sequence starting with Neo version prefix byte
 // followed by 20 bytes of ScrptHash and 4 bytes of checksum.
 //
-// String presentation is [Base58
+// String presentation is a [Base58
 // Check](https://en.bitcoin.it/wiki/Base58Check_encoding) Encoded string.
 //
-// JSON value will be the data encoded as a string using standard base64
+// JSON value will be data encoded as a string using standard base64
 // encoding with paddings. Either
 // [standard](https://tools.ietf.org/html/rfc4648#section-4) or
 // [URL-safe](https://tools.ietf.org/html/rfc4648#section-5) base64 encoding
@@ -377,7 +377,7 @@ func (x *OwnerID) GetValue() []byte {
 //
 // String representation of a value is base-10 integer.
 //
-// JSON representation is an object containing single `value` number field.
+// JSON representation is an object containing a single `value` number field.
 type SubnetID struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -429,7 +429,7 @@ func (x *SubnetID) GetValue() uint32 {
 // API version used by a node.
 //
 // String presentation is a Semantic Versioning 2.0.0 compatible version string
-// with 'v' prefix. I.e. `vX.Y`, where `X` - major number, `Y` - minor number.
+// with 'v' prefix. i.e. `vX.Y`, where `X` is the major number, `Y` is the minor number.
 type Version struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -613,7 +613,7 @@ func (x *SignatureRFC6979) GetSign() []byte {
 }
 
 // Checksum message.
-// Depending on checksum algorithm type the string presentation may vary:
+// Depending on checksum algorithm type, the string presentation may vary:
 //
 // * TZ \
 //   Hex encoded string without `0x` prefix
diff --git a/reputation/grpc/service.pb.go b/reputation/grpc/service.pb.go
index 865de18..719ad5c 100644
--- a/reputation/grpc/service.pb.go
+++ b/reputation/grpc/service.pb.go
@@ -91,7 +91,7 @@ func (x *AnnounceLocalTrustRequest) GetVerifyHeader() *grpc.RequestVerificationH
 	return nil
 }
 
-// Node's local trust information announce response.
+// Node's local trust information announcement response.
 type AnnounceLocalTrustResponse struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -231,7 +231,7 @@ func (x *AnnounceIntermediateResultRequest) GetVerifyHeader() *grpc.RequestVerif
 	return nil
 }
 
-// Intermediate global trust information announce response.
+// Intermediate global trust information announcement response.
 type AnnounceIntermediateResultResponse struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -311,7 +311,7 @@ type AnnounceLocalTrustRequest_Body struct {
 	Epoch uint64 `protobuf:"varint,1,opt,name=epoch,proto3" json:"epoch,omitempty"`
 	// List of normalized local trust values to other NeoFS nodes. The value
 	// is calculated according to EigenTrust++ algorithm and must be a
-	// floating point number in the [0;1] range.
+	// floating point number in [0;1] range.
 	Trusts []*Trust `protobuf:"bytes,2,rep,name=trusts,proto3" json:"trusts,omitempty"`
 }
 
@@ -361,9 +361,9 @@ func (x *AnnounceLocalTrustRequest_Body) GetTrusts() []*Trust {
 	return nil
 }
 
-// Response to the node's local trust information announce has an empty body
+// Response to the node's local trust information announcement has an empty body
 // because the trust exchange operation is asynchronous. If Trust information
-// will not pass sanity checks it is silently ignored.
+// does not pass sanity checks, it is silently ignored.
 type AnnounceLocalTrustResponse_Body struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -469,9 +469,9 @@ func (x *AnnounceIntermediateResultRequest_Body) GetTrust() *PeerToPeerTrust {
 	return nil
 }
 
-// Response to the node's intermediate global trust information announce has
+// Response to the node's intermediate global trust information announcement has
 // an empty body because the trust exchange operation is asynchronous. If
-// Trust information will not pass sanity checks it is silently ignored.
+// Trust information does not pass sanity checks, it is silently ignored.
 type AnnounceIntermediateResultResponse_Body struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
diff --git a/reputation/grpc/service_grpc.pb.go b/reputation/grpc/service_grpc.pb.go
index 1bd9b79..bf93cb9 100644
--- a/reputation/grpc/service_grpc.pb.go
+++ b/reputation/grpc/service_grpc.pb.go
@@ -1,8 +1,4 @@
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
-// versions:
-// - protoc-gen-go-grpc v1.2.0
-// - protoc             v3.19.4
-// source: reputation/grpc/service.proto
 
 package reputation
 
@@ -29,7 +25,7 @@ type ReputationServiceClient interface {
 	// local trust has been successfully announced;
 	// - Common failures (SECTION_FAILURE_COMMON).
 	AnnounceLocalTrust(ctx context.Context, in *AnnounceLocalTrustRequest, opts ...grpc.CallOption) (*AnnounceLocalTrustResponse, error)
-	// Announces the intermediate result of the iterative algorithm for
+	// Announce the intermediate result of the iterative algorithm for
 	// calculating the global reputation of the node in NeoFS network.
 	//
 	// Statuses:
@@ -76,7 +72,7 @@ type ReputationServiceServer interface {
 	// local trust has been successfully announced;
 	// - Common failures (SECTION_FAILURE_COMMON).
 	AnnounceLocalTrust(context.Context, *AnnounceLocalTrustRequest) (*AnnounceLocalTrustResponse, error)
-	// Announces the intermediate result of the iterative algorithm for
+	// Announce the intermediate result of the iterative algorithm for
 	// calculating the global reputation of the node in NeoFS network.
 	//
 	// Statuses:
diff --git a/reputation/grpc/types.pb.go b/reputation/grpc/types.pb.go
index b27aa42..2c6253f 100644
--- a/reputation/grpc/types.pb.go
+++ b/reputation/grpc/types.pb.go
@@ -21,13 +21,13 @@ const (
 	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
 )
 
-// NeoFS unique peer identifier is 33 byte long compressed public key of the
+// NeoFS unique peer identifier is a 33 byte long compressed public key of the
 // node, the same as the one stored in the network map.
 //
-// String presentation is
+// String presentation is a
 // [base58](https://tools.ietf.org/html/draft-msporny-base58-02) encoded string.
 //
-// JSON value will be the data encoded as a string using standard base64
+// JSON value will be data encoded as a string using standard base64
 // encoding with paddings. Either
 // [standard](https://tools.ietf.org/html/rfc4648#section-4) or
 // [URL-safe](https://tools.ietf.org/html/rfc4648#section-5) base64 encoding
@@ -202,7 +202,7 @@ type GlobalTrust struct {
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	// Message format version. Effectively the version of API library used to create
+	// Message format version. Effectively, the version of API library used to create
 	// the message.
 	Version *grpc.Version `protobuf:"bytes,1,opt,name=version,proto3" json:"version,omitempty"`
 	// Message body
diff --git a/session/grpc/service.pb.go b/session/grpc/service.pb.go
index 33510ad..b8a93cf 100644
--- a/session/grpc/service.pb.go
+++ b/session/grpc/service.pb.go
@@ -27,7 +27,7 @@ type CreateRequest struct {
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	// Body of create session token request message.
+	// Body of a create session token request message.
 	Body *CreateRequest_Body `protobuf:"bytes,1,opt,name=body,proto3" json:"body,omitempty"`
 	// Carries request meta information. Header data is used only to regulate
 	// message transport and does not affect request execution.
diff --git a/session/grpc/service_grpc.pb.go b/session/grpc/service_grpc.pb.go
index 787a564..d2f6894 100644
--- a/session/grpc/service_grpc.pb.go
+++ b/session/grpc/service_grpc.pb.go
@@ -1,8 +1,4 @@
 // Code generated by protoc-gen-go-grpc. DO NOT EDIT.
-// versions:
-// - protoc-gen-go-grpc v1.2.0
-// - protoc             v3.19.4
-// source: session/grpc/service.proto
 
 package session
 
@@ -22,7 +18,7 @@ const _ = grpc.SupportPackageIsVersion7
 //
 // For semantics around ctx use and closing/ending streaming RPCs, please refer to https://pkg.go.dev/google.golang.org/grpc/?tab=doc#ClientConn.NewStream.
 type SessionServiceClient interface {
-	// Opens a new session between two peers.
+	// Open a new session between two peers.
 	//
 	// Statuses:
 	// - **OK** (0, SECTION_SUCCESS):
@@ -52,7 +48,7 @@ func (c *sessionServiceClient) Create(ctx context.Context, in *CreateRequest, op
 // All implementations should embed UnimplementedSessionServiceServer
 // for forward compatibility
 type SessionServiceServer interface {
-	// Opens a new session between two peers.
+	// Open a new session between two peers.
 	//
 	// Statuses:
 	// - **OK** (0, SECTION_SUCCESS):
diff --git a/session/grpc/types.pb.go b/session/grpc/types.pb.go
index eacccfa..0d76bdf 100644
--- a/session/grpc/types.pb.go
+++ b/session/grpc/types.pb.go
@@ -340,10 +340,10 @@ func (x *SessionToken) GetSignature() *grpc.Signature {
 	return nil
 }
 
-// Extended headers for Request/Response. May contain any user-defined headers
+// Extended headers for Request/Response. They may contain any user-defined headers
 // to be interpreted on application level.
 //
-// Key name must be unique valid UTF-8 string. Value can't be empty. Requests or
+// Key name must be a unique valid UTF-8 string. Value can't be empty. Requests or
 // Responses with duplicated header names or headers with empty values will be
 // considered invalid.
 //
@@ -356,9 +356,9 @@ func (x *SessionToken) GetSignature() *grpc.Signature {
 //   current epoch only will be used.
 // * __NEOFS__NETMAP_LOOKUP_DEPTH \
 //   If object can't be found using current epoch's netmap, this header limits
-//   how many past epochs back the node can lookup. The `value` is string
-//   encoded `uint64` in decimal presentation. If set to '0' or not set, the
-//   current epoch only will be used.
+//   how many past epochs the node can look up through. The `value` is string
+//   encoded `uint64` in decimal presentation. If set to '0' or not set, only the
+//   current epoch will be used.
 type XHeader struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -624,13 +624,13 @@ func (x *ResponseMetaHeader) GetStatus() *grpc2.Status {
 	return nil
 }
 
-// Verification info for request signed by all intermediate nodes.
+// Verification info for the request signed by all intermediate nodes.
 type RequestVerificationHeader struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	// Request Body signature. Should be generated once by request initiator.
+	// Request Body signature. Should be generated once by the request initiator.
 	BodySignature *grpc.Signature `protobuf:"bytes,1,opt,name=body_signature,json=bodySignature,proto3" json:"body_signature,omitempty"`
 	// Request Meta signature is added and signed by each intermediate node
 	MetaSignature *grpc.Signature `protobuf:"bytes,2,opt,name=meta_signature,json=metaSignature,proto3" json:"meta_signature,omitempty"`
@@ -700,13 +700,13 @@ func (x *RequestVerificationHeader) GetOrigin() *RequestVerificationHeader {
 	return nil
 }
 
-// Verification info for response signed by all intermediate nodes
+// Verification info for the response signed by all intermediate nodes
 type ResponseVerificationHeader struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	// Response Body signature. Should be generated once by answering node.
+	// Response Body signature. Should be generated once by an answering node.
 	BodySignature *grpc.Signature `protobuf:"bytes,1,opt,name=body_signature,json=bodySignature,proto3" json:"body_signature,omitempty"`
 	// Response Meta signature is added and signed by each intermediate node
 	MetaSignature *grpc.Signature `protobuf:"bytes,2,opt,name=meta_signature,json=metaSignature,proto3" json:"meta_signature,omitempty"`
diff --git a/status/grpc/types.pb.go b/status/grpc/types.pb.go
index 168e183..e05fafd 100644
--- a/status/grpc/types.pb.go
+++ b/status/grpc/types.pb.go
@@ -198,6 +198,8 @@ const (
 	Object_LOCK_NON_REGULAR_OBJECT Object = 3
 	// [**2052**] Object has been marked deleted.
 	Object_OBJECT_ALREADY_REMOVED Object = 4
+	// [**2053**] Invalid range has been requested for an object.
+	Object_OUT_OF_RANGE Object = 5
 )
 
 // Enum value maps for Object.
@@ -208,6 +210,7 @@ var (
 		2: "LOCKED",
 		3: "LOCK_NON_REGULAR_OBJECT",
 		4: "OBJECT_ALREADY_REMOVED",
+		5: "OUT_OF_RANGE",
 	}
 	Object_value = map[string]int32{
 		"ACCESS_DENIED":           0,
@@ -215,6 +218,7 @@ var (
 		"LOCKED":                  2,
 		"LOCK_NON_REGULAR_OBJECT": 3,
 		"OBJECT_ALREADY_REMOVED":  4,
+		"OUT_OF_RANGE":            5,
 	}
 )
 
@@ -357,12 +361,12 @@ func (Session) EnumDescriptor() ([]byte, []int) {
 //
 // All outcomes are divided into successful and failed, which corresponds
 // to the success or failure of the operation. The definition of success
-// follows from the semantics of RPC and the description of its purpose.
-// The server must not attach code that is the opposite of outcome type.
+// follows the semantics of RPC and the description of its purpose.
+// The server must not attach code that is the opposite of the outcome type.
 //
 // See the set of return codes in the description for calls.
 //
-// Each status can carry developer-facing error message. It should be human
+// Each status can carry a developer-facing error message. It should be a human
 // readable text in English. The server should not transmit (and the client
 // should not expect) useful information in the message. Field `details`
 // should make the return more detailed.
@@ -523,26 +527,27 @@ var file_status_grpc_types_proto_rawDesc = []byte{
 	0x0a, 0x0a, 0x43, 0x6f, 0x6d, 0x6d, 0x6f, 0x6e, 0x46, 0x61, 0x69, 0x6c, 0x12, 0x0c, 0x0a, 0x08,
 	0x49, 0x4e, 0x54, 0x45, 0x52, 0x4e, 0x41, 0x4c, 0x10, 0x00, 0x12, 0x16, 0x0a, 0x12, 0x57, 0x52,
 	0x4f, 0x4e, 0x47, 0x5f, 0x4d, 0x41, 0x47, 0x49, 0x43, 0x5f, 0x4e, 0x55, 0x4d, 0x42, 0x45, 0x52,
-	0x10, 0x01, 0x2a, 0x76, 0x0a, 0x06, 0x4f, 0x62, 0x6a, 0x65, 0x63, 0x74, 0x12, 0x11, 0x0a, 0x0d,
-	0x41, 0x43, 0x43, 0x45, 0x53, 0x53, 0x5f, 0x44, 0x45, 0x4e, 0x49, 0x45, 0x44, 0x10, 0x00, 0x12,
-	0x14, 0x0a, 0x10, 0x4f, 0x42, 0x4a, 0x45, 0x43, 0x54, 0x5f, 0x4e, 0x4f, 0x54, 0x5f, 0x46, 0x4f,
-	0x55, 0x4e, 0x44, 0x10, 0x01, 0x12, 0x0a, 0x0a, 0x06, 0x4c, 0x4f, 0x43, 0x4b, 0x45, 0x44, 0x10,
-	0x02, 0x12, 0x1b, 0x0a, 0x17, 0x4c, 0x4f, 0x43, 0x4b, 0x5f, 0x4e, 0x4f, 0x4e, 0x5f, 0x52, 0x45,
-	0x47, 0x55, 0x4c, 0x41, 0x52, 0x5f, 0x4f, 0x42, 0x4a, 0x45, 0x43, 0x54, 0x10, 0x03, 0x12, 0x1a,
-	0x0a, 0x16, 0x4f, 0x42, 0x4a, 0x45, 0x43, 0x54, 0x5f, 0x41, 0x4c, 0x52, 0x45, 0x41, 0x44, 0x59,
-	0x5f, 0x52, 0x45, 0x4d, 0x4f, 0x56, 0x45, 0x44, 0x10, 0x04, 0x2a, 0x24, 0x0a, 0x09, 0x43, 0x6f,
-	0x6e, 0x74, 0x61, 0x69, 0x6e, 0x65, 0x72, 0x12, 0x17, 0x0a, 0x13, 0x43, 0x4f, 0x4e, 0x54, 0x41,
-	0x49, 0x4e, 0x45, 0x52, 0x5f, 0x4e, 0x4f, 0x54, 0x5f, 0x46, 0x4f, 0x55, 0x4e, 0x44, 0x10, 0x00,
-	0x2a, 0x31, 0x0a, 0x07, 0x53, 0x65, 0x73, 0x73, 0x69, 0x6f, 0x6e, 0x12, 0x13, 0x0a, 0x0f, 0x54,
-	0x4f, 0x4b, 0x45, 0x4e, 0x5f, 0x4e, 0x4f, 0x54, 0x5f, 0x46, 0x4f, 0x55, 0x4e, 0x44, 0x10, 0x00,
-	0x12, 0x11, 0x0a, 0x0d, 0x54, 0x4f, 0x4b, 0x45, 0x4e, 0x5f, 0x45, 0x58, 0x50, 0x49, 0x52, 0x45,
-	0x44, 0x10, 0x01, 0x42, 0x56, 0x5a, 0x37, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62, 0x2e, 0x63, 0x6f,
-	0x6d, 0x2f, 0x6e, 0x73, 0x70, 0x63, 0x63, 0x2d, 0x64, 0x65, 0x76, 0x2f, 0x6e, 0x65, 0x6f, 0x66,
-	0x73, 0x2d, 0x61, 0x70, 0x69, 0x2d, 0x67, 0x6f, 0x2f, 0x76, 0x32, 0x2f, 0x73, 0x74, 0x61, 0x74,
-	0x75, 0x73, 0x2f, 0x67, 0x72, 0x70, 0x63, 0x3b, 0x73, 0x74, 0x61, 0x74, 0x75, 0x73, 0xaa, 0x02,
-	0x1a, 0x4e, 0x65, 0x6f, 0x2e, 0x46, 0x69, 0x6c, 0x65, 0x53, 0x74, 0x6f, 0x72, 0x61, 0x67, 0x65,
-	0x2e, 0x41, 0x50, 0x49, 0x2e, 0x53, 0x74, 0x61, 0x74, 0x75, 0x73, 0x62, 0x06, 0x70, 0x72, 0x6f,
-	0x74, 0x6f, 0x33,
+	0x10, 0x01, 0x2a, 0x88, 0x01, 0x0a, 0x06, 0x4f, 0x62, 0x6a, 0x65, 0x63, 0x74, 0x12, 0x11, 0x0a,
+	0x0d, 0x41, 0x43, 0x43, 0x45, 0x53, 0x53, 0x5f, 0x44, 0x45, 0x4e, 0x49, 0x45, 0x44, 0x10, 0x00,
+	0x12, 0x14, 0x0a, 0x10, 0x4f, 0x42, 0x4a, 0x45, 0x43, 0x54, 0x5f, 0x4e, 0x4f, 0x54, 0x5f, 0x46,
+	0x4f, 0x55, 0x4e, 0x44, 0x10, 0x01, 0x12, 0x0a, 0x0a, 0x06, 0x4c, 0x4f, 0x43, 0x4b, 0x45, 0x44,
+	0x10, 0x02, 0x12, 0x1b, 0x0a, 0x17, 0x4c, 0x4f, 0x43, 0x4b, 0x5f, 0x4e, 0x4f, 0x4e, 0x5f, 0x52,
+	0x45, 0x47, 0x55, 0x4c, 0x41, 0x52, 0x5f, 0x4f, 0x42, 0x4a, 0x45, 0x43, 0x54, 0x10, 0x03, 0x12,
+	0x1a, 0x0a, 0x16, 0x4f, 0x42, 0x4a, 0x45, 0x43, 0x54, 0x5f, 0x41, 0x4c, 0x52, 0x45, 0x41, 0x44,
+	0x59, 0x5f, 0x52, 0x45, 0x4d, 0x4f, 0x56, 0x45, 0x44, 0x10, 0x04, 0x12, 0x10, 0x0a, 0x0c, 0x4f,
+	0x55, 0x54, 0x5f, 0x4f, 0x46, 0x5f, 0x52, 0x41, 0x4e, 0x47, 0x45, 0x10, 0x05, 0x2a, 0x24, 0x0a,
+	0x09, 0x43, 0x6f, 0x6e, 0x74, 0x61, 0x69, 0x6e, 0x65, 0x72, 0x12, 0x17, 0x0a, 0x13, 0x43, 0x4f,
+	0x4e, 0x54, 0x41, 0x49, 0x4e, 0x45, 0x52, 0x5f, 0x4e, 0x4f, 0x54, 0x5f, 0x46, 0x4f, 0x55, 0x4e,
+	0x44, 0x10, 0x00, 0x2a, 0x31, 0x0a, 0x07, 0x53, 0x65, 0x73, 0x73, 0x69, 0x6f, 0x6e, 0x12, 0x13,
+	0x0a, 0x0f, 0x54, 0x4f, 0x4b, 0x45, 0x4e, 0x5f, 0x4e, 0x4f, 0x54, 0x5f, 0x46, 0x4f, 0x55, 0x4e,
+	0x44, 0x10, 0x00, 0x12, 0x11, 0x0a, 0x0d, 0x54, 0x4f, 0x4b, 0x45, 0x4e, 0x5f, 0x45, 0x58, 0x50,
+	0x49, 0x52, 0x45, 0x44, 0x10, 0x01, 0x42, 0x56, 0x5a, 0x37, 0x67, 0x69, 0x74, 0x68, 0x75, 0x62,
+	0x2e, 0x63, 0x6f, 0x6d, 0x2f, 0x6e, 0x73, 0x70, 0x63, 0x63, 0x2d, 0x64, 0x65, 0x76, 0x2f, 0x6e,
+	0x65, 0x6f, 0x66, 0x73, 0x2d, 0x61, 0x70, 0x69, 0x2d, 0x67, 0x6f, 0x2f, 0x76, 0x32, 0x2f, 0x73,
+	0x74, 0x61, 0x74, 0x75, 0x73, 0x2f, 0x67, 0x72, 0x70, 0x63, 0x3b, 0x73, 0x74, 0x61, 0x74, 0x75,
+	0x73, 0xaa, 0x02, 0x1a, 0x4e, 0x65, 0x6f, 0x2e, 0x46, 0x69, 0x6c, 0x65, 0x53, 0x74, 0x6f, 0x72,
+	0x61, 0x67, 0x65, 0x2e, 0x41, 0x50, 0x49, 0x2e, 0x53, 0x74, 0x61, 0x74, 0x75, 0x73, 0x62, 0x06,
+	0x70, 0x72, 0x6f, 0x74, 0x6f, 0x33,
 }
 
 var (
diff --git a/storagegroup/grpc/types.pb.go b/storagegroup/grpc/types.pb.go
index e0fd05c..de7570a 100644
--- a/storagegroup/grpc/types.pb.go
+++ b/storagegroup/grpc/types.pb.go
@@ -22,9 +22,15 @@ const (
 )
 
 // StorageGroup keeps verification information for Data Audit sessions. Objects
-// that require payed storage guaranties are gathered in `StorageGroups` with
-// additional information used for proof of storage. `StorageGroup` only
+// that require paid storage guarantees are gathered in `StorageGroups` with
+// additional information used for the proof of storage. `StorageGroup` only
 // contains objects from the same container.
+//
+// Being an object payload, StorageGroup may have expiration Epoch set with
+// `__NEOFS__EXPIRATION_EPOCH` well-known attribute. When expired, StorageGroup
+// will be ignored by InnerRing nodes during Data Audit cycles and will be
+// deleted by Storage Nodes.
+//
 type StorageGroup struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
@@ -36,9 +42,11 @@ type StorageGroup struct {
 	// group members. The order of concatenation is the same as the order of the
 	// members in the `members` field.
 	ValidationHash *grpc.Checksum `protobuf:"bytes,2,opt,name=validation_hash,json=validationHash,proto3" json:"validation_hash,omitempty"`
-	// Last NeoFS epoch number of the storage group lifetime
+	// DEPRECATED. Last NeoFS epoch number of the storage group lifetime
+	//
+	// Deprecated: Do not use.
 	ExpirationEpoch uint64 `protobuf:"varint,3,opt,name=expiration_epoch,json=expirationEpoch,proto3" json:"expiration_epoch,omitempty"`
-	// Strictly ordered list of storage group member objects
+	// Strictly ordered list of storage group member objects. Members MUST be unique
 	Members []*grpc.ObjectID `protobuf:"bytes,4,rep,name=members,proto3" json:"members,omitempty"`
 }
 
@@ -88,6 +96,7 @@ func (x *StorageGroup) GetValidationHash() *grpc.Checksum {
 	return nil
 }
 
+// Deprecated: Do not use.
 func (x *StorageGroup) GetExpirationEpoch() uint64 {
 	if x != nil {
 		return x.ExpirationEpoch
@@ -109,7 +118,7 @@ var file_storagegroup_grpc_types_proto_rawDesc = []byte{
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@@ -118,20 +127,20 @@ var file_storagegroup_grpc_types_proto_rawDesc = []byte{
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 }
 
 var (
diff --git a/tombstone/grpc/types.pb.go b/tombstone/grpc/types.pb.go
index 421b284..747532b 100644
--- a/tombstone/grpc/types.pb.go
+++ b/tombstone/grpc/types.pb.go
@@ -21,20 +21,20 @@ const (
 	_ = protoimpl.EnforceVersion(protoimpl.MaxVersion - 20)
 )
 
-// Tombstone keeps record of deleted objects for few epochs until they are
+// Tombstone keeps record of deleted objects for a few epochs until they are
 // purged from the NeoFS network.
 type Tombstone struct {
 	state         protoimpl.MessageState
 	sizeCache     protoimpl.SizeCache
 	unknownFields protoimpl.UnknownFields
 
-	// Last NeoFS epoch number of the tombstone lifetime. It's set by tombstone
-	// creator depending on current NeoFS network settings. Tombstone object
+	// Last NeoFS epoch number of the tombstone lifetime. It's set by the tombstone
+	// creator depending on the current NeoFS network settings. A tombstone object
 	// must have the same expiration epoch value in `__NEOFS__EXPIRATION_EPOCH`
-	// attribute. Otherwise tombstone will be rejected by storage node.
+	// attribute. Otherwise, the tombstone will be rejected by a storage node.
 	ExpirationEpoch uint64 `protobuf:"varint,1,opt,name=expiration_epoch,json=expirationEpoch,proto3" json:"expiration_epoch,omitempty"`
 	// 16 byte UUID used to identify the split object hierarchy parts. Must be
-	// unique inside container. All objects participating in the split must
+	// unique inside a container. All objects participating in the split must
 	// have the same `split_id` value.
 	SplitId []byte `protobuf:"bytes,2,opt,name=split_id,json=splitID,proto3" json:"split_id,omitempty"`
 	// List of objects to be deleted.