Will depend heavily on how it is interpreted and exercised by Cabinet, it's ex-ante accountability - required parliamentary reporting after the fact.

Personal opinion as a Canadian, and may not be popular...but I like it's done this way to a degree, I actually have more faith in the Governor in Council than how the courts might interperate this, there is a lot of political risk to using this, and I do believe that the crown will in fact enforce parliamentary accountability. If this truly is a national security tool, these powers are less alarming than, say, those granted directly to an independent agency or to security services acting without crown/ministerial oversight.