Could be even more misleading ...
Say you have a piece of equipment, a ring, with a gem in it (that also has a description of the gem in itself). Then you find a room with a hidden gem inside a description and readily go 'exa gem' -- ending up getting the description of the gem in the ring instead of in the room.
That's sometimes not very obvious, if you aren't aware of the description of the gem in the ring. So it's not just items on you, but also possible descriptions on those items
But as Snafu said, chalk one up for 'in room', it's easy to forget.