Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the behavioral burden, but for a zero-parameter metadata reader the burden is light. It discloses the full shape of the response (columns, numeric flags, row count, provenance banner), making the read-only nature and output content evident without stating it in safety terms.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.