diff --git a/cmd/frostfs-cli/internal/client/sdk.go b/cmd/frostfs-cli/internal/client/sdk.go
index 2d9c45cbd..1eadfa2e1 100644
--- a/cmd/frostfs-cli/internal/client/sdk.go
+++ b/cmd/frostfs-cli/internal/client/sdk.go
@@ -56,7 +56,7 @@ func GetSDKClient(ctx context.Context, cmd *cobra.Command, key *ecdsa.PrivateKey
 	prmDial := client.PrmDial{
 		Endpoint: addr.URIAddr(),
 		GRPCDialOptions: []grpc.DialOption{
-			grpc.WithChainUnaryInterceptor(tracing.NewUnaryClientInteceptor()),
+			grpc.WithChainUnaryInterceptor(tracing.NewUnaryClientInterceptor()),
 			grpc.WithChainStreamInterceptor(tracing.NewStreamClientInterceptor()),
 			grpc.WithDefaultCallOptions(grpc.WaitForReady(true)),
 		},
diff --git a/cmd/frostfs-cli/modules/tree/client.go b/cmd/frostfs-cli/modules/tree/client.go
index 933378df6..421b96ccd 100644
--- a/cmd/frostfs-cli/modules/tree/client.go
+++ b/cmd/frostfs-cli/modules/tree/client.go
@@ -33,7 +33,7 @@ func _client() (tree.TreeServiceClient, error) {
 
 	opts := []grpc.DialOption{
 		grpc.WithChainUnaryInterceptor(
-			tracing.NewUnaryClientInteceptor(),
+			tracing.NewUnaryClientInterceptor(),
 		),
 		grpc.WithChainStreamInterceptor(
 			tracing.NewStreamClientInterceptor(),
diff --git a/go.mod b/go.mod
index eeaca1645..fafb4f828 100644
--- a/go.mod
+++ b/go.mod
@@ -7,7 +7,7 @@ require (
 	git.frostfs.info/TrueCloudLab/frostfs-contract v0.21.1
 	git.frostfs.info/TrueCloudLab/frostfs-crypto v0.6.0
 	git.frostfs.info/TrueCloudLab/frostfs-locode-db v0.4.1-0.20240710074952-65761deb5c0d
-	git.frostfs.info/TrueCloudLab/frostfs-observability v0.0.0-20250212111929-d34e1329c824
+	git.frostfs.info/TrueCloudLab/frostfs-observability v0.0.0-20250321063246-93b681a20248
 	git.frostfs.info/TrueCloudLab/frostfs-qos v0.0.0-20250310135838-3e7ca9403529
 	git.frostfs.info/TrueCloudLab/frostfs-sdk-go v0.0.0-20250306092416-69b0711d12d9
 	git.frostfs.info/TrueCloudLab/hrw v1.2.1
diff --git a/go.sum b/go.sum
index a8f7216a5..7818583d4 100644
--- a/go.sum
+++ b/go.sum
@@ -6,8 +6,8 @@ git.frostfs.info/TrueCloudLab/frostfs-crypto v0.6.0 h1:FxqFDhQYYgpe41qsIHVOcdzSV
 git.frostfs.info/TrueCloudLab/frostfs-crypto v0.6.0/go.mod h1:RUIKZATQLJ+TaYQa60X2fTDwfuhMfm8Ar60bQ5fr+vU=
 git.frostfs.info/TrueCloudLab/frostfs-locode-db v0.4.1-0.20240710074952-65761deb5c0d h1:uJ/wvuMdepbkaV8XMS5uN9B0FQWMep0CttSuDZiDhq0=
 git.frostfs.info/TrueCloudLab/frostfs-locode-db v0.4.1-0.20240710074952-65761deb5c0d/go.mod h1:7ZZq8iguY7qFsXajdHGmZd2AW4QbucyrJwhbsRfOfek=
-git.frostfs.info/TrueCloudLab/frostfs-observability v0.0.0-20250212111929-d34e1329c824 h1:Mxw1c/8t96vFIUOffl28lFaHKi413oCBfLMGJmF9cFA=
-git.frostfs.info/TrueCloudLab/frostfs-observability v0.0.0-20250212111929-d34e1329c824/go.mod h1:kbwB4v2o6RyOfCo9kEFeUDZIX3LKhmS0yXPrtvzkQ1g=
+git.frostfs.info/TrueCloudLab/frostfs-observability v0.0.0-20250321063246-93b681a20248 h1:fluzML8BIIabd07LyPSjc0JAV2qymWkPiFaLrXdALLA=
+git.frostfs.info/TrueCloudLab/frostfs-observability v0.0.0-20250321063246-93b681a20248/go.mod h1:kbwB4v2o6RyOfCo9kEFeUDZIX3LKhmS0yXPrtvzkQ1g=
 git.frostfs.info/TrueCloudLab/frostfs-qos v0.0.0-20250310135838-3e7ca9403529 h1:CBreXSxGoYJAdZ1QdJPsDs1UCXGF5psinII0lxtohsc=
 git.frostfs.info/TrueCloudLab/frostfs-qos v0.0.0-20250310135838-3e7ca9403529/go.mod h1:PCijYq4oa8vKtIEcUX6jRiszI6XAW+nBwU+T1kB4d1U=
 git.frostfs.info/TrueCloudLab/frostfs-sdk-go v0.0.0-20250306092416-69b0711d12d9 h1:svCl6NDAPZ/KuQPjdVKo74RkCIANesxUPM45zQZDhSw=
diff --git a/internal/qos/grpc.go b/internal/qos/grpc.go
index 534a1f74b..58cd9e52c 100644
--- a/internal/qos/grpc.go
+++ b/internal/qos/grpc.go
@@ -26,7 +26,7 @@ func NewAdjustOutgoingIOTagUnaryClientInterceptor() grpc.UnaryClientInterceptor
 		if err != nil {
 			tag = IOTagClient
 		}
-		if tag == IOTagBackground || tag == IOTagPolicer || tag == IOTagWritecache {
+		if tag.IsLocal() {
 			tag = IOTagInternal
 		}
 		ctx = tagging.ContextWithIOTag(ctx, tag.String())
@@ -44,7 +44,7 @@ func NewAdjustOutgoingIOTagStreamClientInterceptor() grpc.StreamClientIntercepto
 		if err != nil {
 			tag = IOTagClient
 		}
-		if tag == IOTagBackground || tag == IOTagPolicer || tag == IOTagWritecache {
+		if tag.IsLocal() {
 			tag = IOTagInternal
 		}
 		ctx = tagging.ContextWithIOTag(ctx, tag.String())
diff --git a/internal/qos/limiter.go b/internal/qos/limiter.go
index e92cef652..98d254fd0 100644
--- a/internal/qos/limiter.go
+++ b/internal/qos/limiter.go
@@ -74,7 +74,7 @@ func createScheduler(config limits.OpConfig) (scheduler, error) {
 
 func converToSchedulingTags(limits []limits.IOTagConfig) map[string]scheduling.TagInfo {
 	result := make(map[string]scheduling.TagInfo)
-	for _, tag := range []IOTag{IOTagClient, IOTagBackground, IOTagInternal, IOTagPolicer, IOTagWritecache} {
+	for _, tag := range []IOTag{IOTagBackground, IOTagClient, IOTagInternal, IOTagPolicer, IOTagTreeSync, IOTagWritecache} {
 		result[tag.String()] = scheduling.TagInfo{
 			Share: defaultShare,
 		}
diff --git a/internal/qos/stats.go b/internal/qos/stats.go
index f077f552b..3ecfad9f9 100644
--- a/internal/qos/stats.go
+++ b/internal/qos/stats.go
@@ -3,12 +3,13 @@ package qos
 const unknownStatsTag = "unknown"
 
 var statTags = map[string]struct{}{
-	IOTagClient.String():     {},
 	IOTagBackground.String(): {},
+	IOTagClient.String():     {},
+	IOTagCritical.String():   {},
 	IOTagInternal.String():   {},
 	IOTagPolicer.String():    {},
+	IOTagTreeSync.String():   {},
 	IOTagWritecache.String(): {},
-	IOTagCritical.String():   {},
 	unknownStatsTag:          {},
 }
 
diff --git a/internal/qos/tags.go b/internal/qos/tags.go
index 9db45f190..e3f7cafd6 100644
--- a/internal/qos/tags.go
+++ b/internal/qos/tags.go
@@ -10,30 +10,33 @@ import (
 type IOTag string
 
 const (
-	IOTagClient     IOTag = "client"
-	IOTagInternal   IOTag = "internal"
 	IOTagBackground IOTag = "background"
-	IOTagWritecache IOTag = "writecache"
-	IOTagPolicer    IOTag = "policer"
+	IOTagClient     IOTag = "client"
 	IOTagCritical   IOTag = "critical"
+	IOTagInternal   IOTag = "internal"
+	IOTagPolicer    IOTag = "policer"
+	IOTagTreeSync   IOTag = "treesync"
+	IOTagWritecache IOTag = "writecache"
 
 	ioTagUnknown IOTag = ""
 )
 
 func FromRawString(s string) (IOTag, error) {
 	switch s {
-	case string(IOTagCritical):
-		return IOTagCritical, nil
-	case string(IOTagClient):
-		return IOTagClient, nil
-	case string(IOTagInternal):
-		return IOTagInternal, nil
 	case string(IOTagBackground):
 		return IOTagBackground, nil
-	case string(IOTagWritecache):
-		return IOTagWritecache, nil
+	case string(IOTagClient):
+		return IOTagClient, nil
+	case string(IOTagCritical):
+		return IOTagCritical, nil
+	case string(IOTagInternal):
+		return IOTagInternal, nil
 	case string(IOTagPolicer):
 		return IOTagPolicer, nil
+	case string(IOTagTreeSync):
+		return IOTagTreeSync, nil
+	case string(IOTagWritecache):
+		return IOTagWritecache, nil
 	default:
 		return ioTagUnknown, fmt.Errorf("unknown tag %s", s)
 	}
@@ -50,3 +53,7 @@ func IOTagFromContext(ctx context.Context) string {
 	}
 	return tag
 }
+
+func (t IOTag) IsLocal() bool {
+	return t == IOTagBackground || t == IOTagPolicer || t == IOTagWritecache || t == IOTagTreeSync
+}
diff --git a/internal/qos/validate.go b/internal/qos/validate.go
index 3fa4ebbd1..d4475e38b 100644
--- a/internal/qos/validate.go
+++ b/internal/qos/validate.go
@@ -42,11 +42,12 @@ func validateOpConfig(c limits.OpConfig) error {
 
 func validateTags(configTags []limits.IOTagConfig) error {
 	tags := map[IOTag]tagConfig{
+		IOTagBackground: {},
 		IOTagClient:     {},
 		IOTagInternal:   {},
-		IOTagBackground: {},
-		IOTagWritecache: {},
 		IOTagPolicer:    {},
+		IOTagTreeSync:   {},
+		IOTagWritecache: {},
 	}
 	for _, t := range configTags {
 		tag, err := FromRawString(t.Tag)
diff --git a/pkg/network/cache/multi.go b/pkg/network/cache/multi.go
index e94fa580a..77420865a 100644
--- a/pkg/network/cache/multi.go
+++ b/pkg/network/cache/multi.go
@@ -66,7 +66,7 @@ func (x *multiClient) createForAddress(ctx context.Context, addr network.Address
 		grpc.WithChainUnaryInterceptor(
 			qos.NewAdjustOutgoingIOTagUnaryClientInterceptor(),
 			metrics.NewUnaryClientInterceptor(),
-			tracing.NewUnaryClientInteceptor(),
+			tracing.NewUnaryClientInterceptor(),
 			tagging.NewUnaryClientInteceptor(),
 		),
 		grpc.WithChainStreamInterceptor(
diff --git a/pkg/services/tree/cache.go b/pkg/services/tree/cache.go
index 70f4a843b..3359af2c5 100644
--- a/pkg/services/tree/cache.go
+++ b/pkg/services/tree/cache.go
@@ -99,7 +99,7 @@ func (c *clientCache) dialTreeService(ctx context.Context, netmapAddr string) (*
 		grpc.WithChainUnaryInterceptor(
 			qos.NewAdjustOutgoingIOTagUnaryClientInterceptor(),
 			metrics.NewUnaryClientInterceptor(),
-			tracing.NewUnaryClientInteceptor(),
+			tracing.NewUnaryClientInterceptor(),
 			tagging.NewUnaryClientInteceptor(),
 		),
 		grpc.WithChainStreamInterceptor(
diff --git a/pkg/services/tree/service.go b/pkg/services/tree/service.go
index eeffec08b..b9bb96bab 100644
--- a/pkg/services/tree/service.go
+++ b/pkg/services/tree/service.go
@@ -85,7 +85,7 @@ func New(opts ...Option) *Service {
 
 // Start starts the service.
 func (s *Service) Start(ctx context.Context) {
-	ctx = tagging.ContextWithIOTag(ctx, qos.IOTagBackground.String())
+	ctx = tagging.ContextWithIOTag(ctx, qos.IOTagTreeSync.String())
 	go s.replicateLoop(ctx)
 	go s.syncLoop(ctx)
 
diff --git a/pkg/services/tree/sync.go b/pkg/services/tree/sync.go
index 89450b739..103e2a613 100644
--- a/pkg/services/tree/sync.go
+++ b/pkg/services/tree/sync.go
@@ -344,7 +344,7 @@ func (*Service) createConnection(a network.Address) (*grpc.ClientConn, error) {
 		grpc.WithChainUnaryInterceptor(
 			qos.NewAdjustOutgoingIOTagUnaryClientInterceptor(),
 			metrics.NewUnaryClientInterceptor(),
-			tracing_grpc.NewUnaryClientInteceptor(),
+			tracing_grpc.NewUnaryClientInterceptor(),
 			tagging.NewUnaryClientInteceptor(),
 		),
 		grpc.WithChainStreamInterceptor(