Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description bears full responsibility. It only says 'Update a file' without disclosing whether this is a partial update (PATCH) or a full replacement, what permissions are required, whether changes are reversible, or what happens to unspecified fields. The mutation side effects are completely opaque.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.