Mm... They like to see the good in people, so maybe they'll just trust what you have to say.

[ he sounds a little unsure, because none of team B are as open as he or the rest of team A. but hopeful, nonetheless. ]

I don't see why you couldn't? You know the items, just not what they do. [ ... ] Maybe don't out all the powers, though? Since those are meant to be secret in the first place. Just keep them in mind, maybe.