"We're errand boys, mostly." A beat. "Everything from playing bodyguard to ambassador to detective."

But, more than that... "Frankly, I think they're just building a people zoo and the weirder the specimen they can find is, they better." A beat. "Oh, um- Free advice: Don't trade anything for anything. Think they're collecting any weird powers and abilities we might have." And the last thing the court rulers needed is Thanos's... Anything, really. They were already a nightmare to fight. And Thanos, sans magic, was already a nightmare to fight, so for Tony's blood pressure, he's going to try and steer that ship away from that worst case scenario.