func (a ExecuteAuthorization) ValidateBasic() error {
             return errors.Wrapf(sdkerrors.ErrInvalidRequest, "invalid module name: %s", v.ModuleName)
         }
         if len(v.FunctionNames) == 0 {
-            return errors.Wrap(sdkerrors.ErrInvalidRequest, "invalid module names")
+            return errors.Wrap(sdkerrors.ErrInvalidRequest, "function names cannot be empty")
         }
