A governance rule evaluated at the moment an agent attempts a tool call, resolving to block, filter, or flag for review.
Low; a curated, deliberately small rule set per tool/agent combination
Versioned — a policy change is itself a governance-relevant event
Only the control-bearing entities were modelled for lifecycle. Defensible as a starting point, but it does leave the entity model uneven, and this is incompleteness rather than a finding.