"Considering it limits how I, ...How I can speak, and how the other can reply for that matter, it is specifically for emergencies and discretion," he curtly replies. He also seems quite unaffected by Strange's upset.

Possibly because he has at least once heard about Mirrors being a Risk, or something. Anyway.

"Regardless- If I have to, you shall know," he adds. One has to admit- it's difficult to 'overhear' a soul talk.