A question, how does "I make a perception check..." NOT qualify under this exact circumstance?
Translated from the jargon it means " I use every resource available to me under the circumstances, to perceive what is around me." It is EXPRESSLY asking for an active surveillance of the area. And can be pictured easily by the DM as such.
Sure, the player is technically asking for a roll, but really they are asking for the DM to provide all available information the character (at whatever level of perception he is capable of) can glean. So the DM may not actually require one.
It's a perfectly fine, if general, action declaration.