Yeah, No worry they wont find any thing to major if that's what you want. They might report the general size of of a town or if it seems well defended, what they might want to trade for. Things like that, it most likely would be a while until they found any thing major considering your guys are wary of outsiders. Also with the magical artifact, that could work since one of their main tasks is to hunt down magical artifacts, or uncover the magical secrets of other nations.
And thanks im glad you like the idea, I wanted them to be like the elite secret police when it comes to problems internally, and spys/ assassins when out and about. Skilled in illusion, short distant teleportation, and melee combat. I'm thinking of setting up more orders like them in the future to spread the holy word of Einarr, secs of holy warriors that would be very skilled but limited in number