Ref T13411. Currently, if you hit a policy exception because you can't view an object, we disclose details about the view policy of the object, particularly which project's members can see the object for project policies.
Although there's a large amount of grey area here, this feels like a more substantial disclosure than we offer in other contexts. Instead, if you encounter a policy exception while testing "CAN_VIEW" or don't have "CAN_VIEW", present an "opaque" explanation which omits details that viewers who can't view the object shouldn't have access to. Today, this is the name of "Project" policies (and, implicitly, the rulesets of custom policies, which we now disclose in other similar contexts).