Note these are all subject to change.
Revoking Peace Treaty DISABLES ALL your units movement on that turn. So make all your moves before you revoke it.
Revoking Peace Treaty also REMOVES ALL your units on enemies' land. So no insta domination possible. (Idk if cloak is exception)
Trying to attack, or capture enemy tribe will immediately destroy your embassy on that tribe. Seems like once it's destroyed you can't rebuild it, but idk.
General tip, AIs are likely to accept peace treaty only when you and they are far away.