Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already indicate readOnlyHint, idempotentHint, and non-destructive behavior. The description adds no further behavioral detail (e.g., what validation checks are performed, error conditions, or output format). The output schema exists but the description doesn't leverage it.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.