Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden of behavioral disclosure. It reveals that Pro tier is required and enumerates the returned data categories, which is useful. However, it does not mention rate limits, error handling, or behavior on invalid state codes, leaving some operational uncertainty for a first-time agent.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.