If your country backs up your claim for diplomatic immunity, it's pretty much good. There's no other measure of quality that matters in a practical sense. If t

If your country backs up your claim for diplomatic immunity, it's pretty much good. There's no other measure of quality that matters in a practical sense. If the host country wants to dispute that, their recourse is expulsion. And CIA and other agencies certainly do act under the auspices of diplomatic protection. Barring any movie-like treasonous behavior, why wouldn't they? They're government officials working in an official capacity while abroad. Besides, being ex-CIA doesn't disqualify spousal immunity. Even if the host country had a problem with that, the recourse is... expulsion.