GM new to Torchbearer, some questions

… Another one…

Secret doors are found with Scout, but the factors for using Scout for this are unclear to me.

Most importantly though, how do I handle players searching a room? Especially a room that doesn’t have what they’re searching for? What will the ob be?

Do they need to specify what they’re searching for (secret doors or traps) and then I figure out an ob based on the the factors in the book?
This would work, even for rooms with nothing to find, but then two tests are required to search a room for both traps and secret doors…

Or would I tell players more than their characters know: if a room has nothing to find I just tell the players they don’t need to roll, and if it has something give them an ob and if they meet it they find anything and everything there is to find? (Even if that’s both traps and secret doors)

The first method seems better to me, but is that the intention: players declare what they’re looking for with a test, and cannot find anything except what they’ve specified unless they make another test?