The premise
Enterprise governance for thirty years has been a discipline of declaration. A system pronounces a fact (this is the master record, this is the permitted action, this is the classification) and the rest of the stack is asked to comply.
This worked because the actors downstream were human. People noticed when the catalog was stale and overrode it. People escalated the ambiguous case. The governance system was the starting point for human judgment, not a replacement for it.
Agentic execution removes the human safety net. A declaration is now the decision, made at the latency of an API call, with no afternoon to think about it. The premise of declarative governance has expired. What replaces it is a control plane that adjudicates across sources rather than picking one to trust.