diff --git a/cmd/frostfs-cli/modules/container/policy_playground.go b/cmd/frostfs-cli/modules/container/policy_playground.go
index 377cf43c6..2cc1107ef 100644
--- a/cmd/frostfs-cli/modules/container/policy_playground.go
+++ b/cmd/frostfs-cli/modules/container/policy_playground.go
@@ -279,7 +279,7 @@ func (repl *policyPlaygroundREPL) handleCommand(args []string) error {
 	case "help":
 		return repl.handleHelp(args[1:])
 	}
-	return fmt.Errorf("unknown command %q", args[0])
+	return fmt.Errorf("unknown command %q. See 'help' for assistance", args[0])
 }
 
 func (repl *policyPlaygroundREPL) run() error {