The fundamental problem with these "agreements" is that they are utterly nonsensical as written. Google has one idea of "lawful" and what it means; the Pentagon most definitely has a vastly different interpretation meaning "whatever we want". These companies make these agreements because they do not understand (either deliberately or just by the factor of them not understanding the intelligence sector) that when the intelligence community says "we will only use this for lawful purposes," what they are really telling you is something very, very different. With entities like the Pentagon your agreements should probably both define what "lawful" really means and should provide as few ambiguities as you can manage. Ideally you'd provide zero ambiguities but I'm not sure that's achievable in practice.