It seemed mostly internal - highly useful, in certain circumstances, but in terms of external detection.... "Perhaps, perhaps not. I'm loath to disregard any possible advantage." If nothing else, Bucky would be more than decent backup, on occasions when he needed a quieter companion than his brother.

Thor was many things. Subtle wasn't generally one of them.

"If you'll take my advice, never stay in a cage if you have the opportunity to leave it behind." There was something almost bewitching in the idea of being somewhere untouchable and untraceable... but there were many such places in the universe, surely. There was no reason to stay on one so pink. "But I'm sure we'll have time to convince you to my point of view on that."