Doesn’t “instead of going east in the corridor” work? I thought (not looking it up) that “going east in the corridor” works when there’s no east exit, but “going east from the corridor” requires an exit.
There’s probably some folks out there who type “walk east,” and there may be noobs and stuff who’ll try it. When I tried “Cold Iron” out on a noob, she got surprisingly far typing fairly natural stuff like “look at the table” – though the compass direction navigation was what gave her the most trouble. “Go through the door” would probably be what she’d try.
Avoiding the problem isn’t a bad idea, as a player, I’d probably prefer splitting up the directions to splitting up the rooms.