Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description must convey behavioral traits but only states 'Update cron job' with HTTP method and category. It does not disclose idempotency, required fields beyond id, authentication needs, rate limits, or side effects. This is insufficient for an agent to understand tool behavior.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.