I find that in OSE/Basic it is less of an issue actually. IMO, as DnD has grown, it has added NWPs, Skills, and all manner of other "abilities" to the character sheet. So when play happens, the player naturally looks to the sheet and the "things that I can do" listed there. In OSE/Basic, the character sheet is pretty sparse. So players are almost forced to describe what they want to do. There is no "Investigation" or "Perception" or anything on their sheet.
As DM, I often say, so what are you looking for? What are you doing? Are you looking anywhere specific? If they say "I search the whole room", that's fine, it takes time 1-2 turns (with wandering monster rolls possible in dungeon), and then its a d6 roll. If they were to say "I make a Perception Check, I'd say, "what are you trying to perceive?" and then time passes, and the same d6 roll...