Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations exist, so the description carries the full behavioral burden; it implies a read-only overview and discloses the content categories returned, which is genuinely useful with no output schema present. However, it says nothing about authentication requirements, permissions, rate limits, or whether the vault must exist, leaving meaningful 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.