[@ArenaSnow]

You would detect it like any wizard casting detect magic. You would know something is three that is magic and that would be it. Literally know information other than that would be given unless you took the time to appraise the item. Same with the ring. 

I wouldn't consider it an overeacation as far as seeing the pace. Almost half the party knows/suspects him as a deconomic and they just met him today. If this same course were to keep up then he will basically be figured out by page 5 or 6. 

[@Lord of Evil]

While I would normally say that it's your characater so that makes sense, in this kind of setting, your character would have no reason not to care or not to tell the others.