Having an air tag in the bag made sense to me, other details, not so much.

A carry-on isn't necessarily something you're going to tote around all day, every day, while traveling, It may get left in the hotel room, or it might be left at coat check at some point, or set down while you transact business at a hotel or airline counter and are distracted. Italy is somewhat notorious for thieves on mopeds snatching bags from people on the sidewalks, maybe that was a concern. Why not make it easier to keep track of all of your bags?