diff --git a/pool/pool.go b/pool/pool.go
index 869ff2c6..2f30ae47 100644
--- a/pool/pool.go
+++ b/pool/pool.go
@@ -1082,8 +1082,6 @@ type ResPatchObject struct {
 }
 
 // PatchObject patches an object through a remote server using FrostFS API protocol.
-//
-// Main return value MUST NOT be processed on an erroneous return.
 func (p *Pool) PatchObject(ctx context.Context, prm PrmObjectPatch) (ResPatchObject, error) {
 	var prmCtx prmContext
 	prmCtx.useDefaultSession()
@@ -1113,8 +1111,6 @@ func (p *Pool) PatchObject(ctx context.Context, prm PrmObjectPatch) (ResPatchObj
 }
 
 // PutObject writes an object through a remote server using FrostFS API protocol.
-//
-// Main return value MUST NOT be processed on an erroneous return.
 func (p *Pool) PutObject(ctx context.Context, prm PrmObjectPut) (ResPutObject, error) {
 	cnr, _ := prm.hdr.ContainerID()
 
@@ -1222,8 +1218,6 @@ type ResGetObject struct {
 }
 
 // GetObject reads object header and initiates reading an object payload through a remote server using FrostFS API protocol.
-//
-// Main return value MUST NOT be processed on an erroneous return.
 func (p *Pool) GetObject(ctx context.Context, prm PrmObjectGet) (ResGetObject, error) {
 	var cc callContext
 	cc.sessionTarget = prm.UseSession
@@ -1245,8 +1239,6 @@ func (p *Pool) GetObject(ctx context.Context, prm PrmObjectGet) (ResGetObject, e
 }
 
 // HeadObject reads object header through a remote server using FrostFS API protocol.
-//
-// Main return value MUST NOT be processed on an erroneous return.
 func (p *Pool) HeadObject(ctx context.Context, prm PrmObjectHead) (object.Object, error) {
 	var cc callContext
 	cc.sessionTarget = prm.UseSession
@@ -1294,8 +1286,6 @@ func (x *ResObjectRange) Close() error {
 
 // ObjectRange initiates reading an object's payload range through a remote
 // server using FrostFS API protocol.
-//
-// Main return value MUST NOT be processed on an erroneous return.
 func (p *Pool) ObjectRange(ctx context.Context, prm PrmObjectRange) (ResObjectRange, error) {
 	var cc callContext
 	cc.sessionTarget = prm.UseSession
@@ -1363,8 +1353,6 @@ func (x *ResObjectSearch) Close() {
 //
 // The call only opens the transmission channel, explicit fetching of matched objects
 // is done using the ResObjectSearch. Resulting reader must be finally closed.
-//
-// Main return value MUST NOT be processed on an erroneous return.
 func (p *Pool) SearchObjects(ctx context.Context, prm PrmObjectSearch) (ResObjectSearch, error) {
 	var cc callContext
 	cc.sessionTarget = prm.UseSession
@@ -1393,8 +1381,6 @@ func (p *Pool) SearchObjects(ctx context.Context, prm PrmObjectSearch) (ResObjec
 //	waiting timeout: 120s
 //
 // Success can be verified by reading by identifier (see GetContainer).
-//
-// Main return value MUST NOT be processed on an erroneous return.
 func (p *Pool) PutContainer(ctx context.Context, prm PrmContainerPut) (cid.ID, error) {
 	cp, err := p.manager.connection()
 	if err != nil {
@@ -1410,8 +1396,6 @@ func (p *Pool) PutContainer(ctx context.Context, prm PrmContainerPut) (cid.ID, e
 }
 
 // GetContainer reads FrostFS container by ID.
-//
-// Main return value MUST NOT be processed on an erroneous return.
 func (p *Pool) GetContainer(ctx context.Context, prm PrmContainerGet) (container.Container, error) {
 	cp, err := p.manager.connection()
 	if err != nil {
@@ -1525,8 +1509,6 @@ func (p *Pool) ListAPEChains(ctx context.Context, prm PrmListAPEChains) ([]ape.C
 }
 
 // Balance requests current balance of the FrostFS account.
-//
-// Main return value MUST NOT be processed on an erroneous return.
 func (p *Pool) Balance(ctx context.Context, prm PrmBalanceGet) (accounting.Decimal, error) {
 	cp, err := p.manager.connection()
 	if err != nil {
@@ -1586,8 +1568,6 @@ func waitFor(ctx context.Context, params *WaitParams, condition func(context.Con
 }
 
 // NetworkInfo requests information about the FrostFS network of which the remote server is a part.
-//
-// Main return value MUST NOT be processed on an erroneous return.
 func (p *Pool) NetworkInfo(ctx context.Context) (netmap.NetworkInfo, error) {
 	cp, err := p.manager.connection()
 	if err != nil {
@@ -1603,8 +1583,6 @@ func (p *Pool) NetworkInfo(ctx context.Context) (netmap.NetworkInfo, error) {
 }
 
 // NetMapSnapshot requests information about the FrostFS network map.
-//
-// Main return value MUST NOT be processed on an erroneous return.
 func (p *Pool) NetMapSnapshot(ctx context.Context) (netmap.NetMap, error) {
 	cp, err := p.manager.connection()
 	if err != nil {