Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full burden of behavioral disclosure. It mentions the HTTP method PUT and the verb 'update', but it does not disclose whether the update is partial or full, what fields are affected, whether permissions are required, or what happens to unspecified version properties.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.