Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries full responsibility for behavioral disclosure. 'Validate' implies a read-only check, but it does not confirm that no state is modified, nor does it mention required permissions, rate limits, or error behavior. The output schema exists but is not referenced for clarifying return values.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.