Right after discovery, I did the full access to phone and emails -- and while some of that helped, I hated playing detective. Someone wants to be with you or they don't.
Her communication definitely revealed some of the boundary work she needed to do. She treated her male co-workers the same way as her female co-workers, but as our MC pointed out, guys often react differently when a woman asks after them or asks personal questions. In other words, my wife offered too much of her information and asked too much about other people.
So, I did ask her to let me know if she had a solo lunch with a male peer -- sometimes it was a boss, sometimes just a salesperson, but I needed to be in the loop in early recovery. It got to the point where I don't have to ask, any meeting my wife has with anyone, she lets me know in advance. She has earned enough trust now, that I have told her she doesn't need to let me know so much, but she says it is a part of her routine, which is nice.
I did mention that if she put in half the energy into us that she did into the A, we would do well.
It wasn't said in a mean or harsh way, I simply pointed out the amazing amount of work that needed to be done to set things up, to keep things secret, and keep each respective family (family friends!) in the dark. My wife's A was just before the cell phone era. Weird 1990's spy phone stuff, like letting a land line ring twice and then hang up. That timing stuff had to be perfect every time.
I told her any discoveries in IC were up to her to tell me, but she shared a lot, which helped me see the work she was doing (repairing esteem, finding her own value, ditching shame, etc.).
No real rules, just outlines and suggestions. I did need to ask her 5.7 billion questions, and she answered them all. It's probably been four years plus since I had any questions about the AP or the A.
I did mention words or new promises weren't helpful, but consistent actions would be.