Part of your role is making sure that the Prime Minister gets the best information. Through these briefings, I'm assuming that at times it seems, from your description, that it's just you getting briefed on some of the matters.
Given that you're not an intelligence official yourself but a consumer, you rely on the work of these officials that is given to you. How do you then determine on what, when and why the Prime Minister gets briefed? How do you make those decisions?