This could have been left as a simple, good item but all the details down to local names they are called due to their picking up of things to put in the bag. It was all genius. And just when I thought it was done and the conclusion was just going to nicely wrap it up, you show a way to render the bag useless and spend its magic so they can't be caught with the item. Awesome!
That thief was a perfect addition that made the post for me. He probably does escape and he probably is getting paid kingly prices to sneak nobles our and/or to smuggle people in to visit. I can see the intrigue and politics continuing on with little restriction because the warden believes everything is as it should. Little does he know that most all roam and move as freely as they were in their own palace.