Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations exist, so the description carries the behavioral burden. 'Show' clearly signals a read-only query with no side effects, and 'quota remaining' indicates the nature of the result. Still, it does not disclose whether authentication is needed, what units or formatting the quota is returned in, or whether quota is user-specific or project-specific.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.