Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
The description adds substantial behavioral detail beyond the annotations: idempotence on already-deleted keywords, that only future snapshot collection stops, and that historical rows are unaffected. This is exactly the side-effect information an agent needs for a destructive call.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.