Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Beyond the annotations it discloses the ~25 second wait, that the run is a private preview invisible to customers, and that it never deploys the agent — exactly the side-effect context an agent needs. The one flaw is the reference to 'pending: true', a parameter that does not exist in this tool's schema, which could mislead an agent trying to set it.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.