Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries full burden. It states the tool is a health check and shows connectivity and storage usage, which implies a read-only operation. However, it does not disclose any potential side effects, permissions, or rate limits. The description is adequate for a non-destructive status check.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.