Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint, idempotentHint, non-destructive and closed-world, so safety is covered. The description adds that the response includes ordered steps and module mapping status, which is useful, but says nothing about errors for unknown pathIds or how locale/idempotencyKey affect behavior.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.