Hi there, thanks for your comment. So, I actually rephrased the bit early in the book regarding 'room traps' and 'treasure traps' - these are now defined as 'simple traps' and 'complex traps', with complex traps requiring thieves tools to disarm. In general, I'd say anything linked to opening a door or chest would be classed as complex. A pit, a hinged trapdoor, a rope attached to an alarm bell etc are all simple traps. I leave this up to the GM to determine, based on the description of the trap and the fiction.
With trap/dungeon generation, unguarded treasure appears on the discovery table and traps appear on the danger table. On delving deeper you can get danger+discovery together, so that would be one hardcoded way to link the two.
Outside of this, you can also interpret unguarded treasure in different ways.. i recently had a room in a crumbling crypt in which my PC found a gem as unguarded treasure.. i decided this was lying amongst the rubble and i wasn't suspicious of a trap. If a treasure makes you suspicious of a trap based on the fiction, I'd definitely ask the oracle.. whilst playing solo I often do this when my character is right in front of the treasure and I say that is him actually checking for traps (1 turn passes), that reflects what would happen at the table with a real GM. Both my character and I find out if there is a trap at the same time.
I would rule that a character skilled in dungeon exploration or thievery should always automatically discover a trap, but I often use the oracle or an attribute check to determine if they can disarm it depending on the fiction (e.g. He cuts the wire connected to the wall - does this disarm it? (Likely Odds) if it doesn't, I'll give him a chance to roll out of the way of whatever trap springs). It keeps a lot of the tension present whilst playing solo.
You can certainly ask the oracle about potential traps on treasure hoards owned by monsters.. but the likelihood will again depend on the type of monster etc.
I hope that helps somewhat? Let me know if I misunderstood.