docs: improve documentation about authority in protos (#14531)

x/auth/types/tx.pb.go

@@ -35,7 +35,7 @@ const _ = proto.GoGoProtoPackageIsVersion3 // please upgrade the proto package
 //
 // Since: cosmos-sdk 0.47
 type MsgUpdateParams struct {
-	// authority is the address of the governance account.
+	// authority is the address that controls the module (defaults to x/gov unless overwritten).
 	Authority string `protobuf:"bytes,1,opt,name=authority,proto3" json:"authority,omitempty"`
 	// params defines the x/auth parameters to update.
 	//
@@ -175,8 +175,8 @@ const _ = grpc.SupportPackageIsVersion4
 //
 // For semantics around ctx use and closing/ending streaming RPCs, please refer to https://godoc.org/google.golang.org/grpc#ClientConn.NewStream.
 type MsgClient interface {
-	// UpdateParams defines a governance operation for updating the x/auth module
-	// parameters. The authority is hard-coded to the x/gov module account.
+	// UpdateParams defines a (governance) operation for updating the x/auth module
+	// parameters. The authority defaults to the x/gov module account.
 	//
 	// Since: cosmos-sdk 0.47
 	UpdateParams(ctx context.Context, in *MsgUpdateParams, opts ...grpc.CallOption) (*MsgUpdateParamsResponse, error)
@@ -201,8 +201,8 @@ func (c *msgClient) UpdateParams(ctx context.Context, in *MsgUpdateParams, opts
 
 // MsgServer is the server API for Msg service.
 type MsgServer interface {
-	// UpdateParams defines a governance operation for updating the x/auth module
-	// parameters. The authority is hard-coded to the x/gov module account.
+	// UpdateParams defines a (governance) operation for updating the x/auth module
+	// parameters. The authority defaults to the x/gov module account.
 	//
 	// Since: cosmos-sdk 0.47
 	UpdateParams(context.Context, *MsgUpdateParams) (*MsgUpdateParamsResponse, error)