Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations only carry destructive/idempotent/closed-world flags; the description adds rich semantics on top: removes matching active prompt assignments, repairs the primary journey stage, leaves retired rows and Scan history intact, and returns null after removal. These side-effect disclosures go well beyond what annotations provide.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.