Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the full burden. It discloses single-item scope ('exactly one') and non-overwriting behavior, which are useful constraints. However, it omits permissions, failure modes, and the role of the required expected_revision concurrency token, leaving significant behavioral gaps.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.