This one I have actually had happen before. A player once said she wanted to check a door for traps and I said “I’m hearing that you want to find out if the door is trapped; what does your character do to try and find that out?” She kind of blinked and said “something my character would know to do because she’s trained at finding traps and I’m not?” I responded, “I recognize that you’re not an expert on traps, neither am I. I just need to be able to picture what’s happening in the fiction in order to adjudicate the result. So, just give me a reasonably specific description and I will do my best to interpret your intent generously, keeping your character’s specialized training in mind.” I don’t remember exactly what she described, I think she said something about looking all around the seams and the handle for any signs of mechanisms. Since there was indeed a lever on the other side that would be pushed triggering a simple bell alarm if opened, I determined that looking at the seams for a mechanism would indeed result in finding that mechanism, with no reasonable chance of failure or consequence, so I told her “oh, yeah, you don’t even need to roll for that,” and proceeded to describe the lever, and note that she could easily determine that opening the door would set off whatever the trap was. After that, she was consistently one of the most confident and creative players at the table when it came to action declarations, and frequently achieved her goals without needing to make checks as a result.