The Bag Scanner allows you to see the contents of another player’s inventory. While it has a limited number of uses, it’s a powerful tool to help deduce the role of a player, as the items they have chosen can give insight into their role. To counteract this item, you can store your more suspicious items with the peddler, stay away from a person with a Bag Scanner, cast doubt on their results, as nobody else can see results or buy less suspicious items from the peddler. Deceit is, afterall, the name of the game.