Per the rumor mill, when guests search for an amenity like a crib on Airbnb, only properties that have this amenity tagged to a certain room will show up in search. This goes beyond room by room photo tagging. Sounds like the amenity itself must be tagged to the room.
Requesting this feature so that OwnerRez properties are not disadvantaged.
We have heard that rumor, probably from the same sources as you. We haven't heard that from Airbnb, and other than adding cribs to rooms, I see no mention of a specific type of tagging for cribs to rooms in their dev docs.
Whenever they announce new features and add support for them to their API, we'll write to those API specifications. We'll close this feature request, as it will be handled through our regular development cycle, if the rumor proves to be true.