Perhaps I can jump in here.
A minister is the head of the institution under the act, and decisions about access are made in his name and under his delegated authority. So if he wants information about a particular access request and how it's been handled, yes, he is entitled to know. The practice I'm aware of is that ministers don't seek that information and neither do their staff. ATIP officers are very well aware that the names of ATIP requesters should not be distributed widely. They should be kept within the ATIP office for the most part. There might be exceptions, but it is not a practice to share it widely.