In thinking about grabbing, I think both are needed. Since inheritance is an “is a” concept, objects in the room would have the “is a” characteristic of grabbable or not. Then the pawn has a component that enables grabbing. Perhaps a grabbable characteristic could also include a glow around an object when the pawn is sufficiently near it.
Populating a room with multiple props, I plan to make it possible to grab some objects and not others (e. g. a plant isn’t grabbable while a chair is). I’d also like some objects that can be grabbed to work with the trigger while others won’t (a pressure plate requires a certain level of pressure to work).