One person suggested things to help thieves when adventuring. I would suggest something along the lines of a 'detect secret', where the thief can see things that are hidden in the description.

IE. if there is a brick in the wall that can be looked at, but most people need to search the descriptions to find it.. a thief might be able to see it outside of the room description.

Of course that would require a boat load of coding, since I'm sure the Imm's wouldn't want to have all hidden objects revealed to thieves.