Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are present, so the description carries the transparency burden. It adds context about grouping and billing ('Group: Keyword Research. Billing per call: 1 Credits') and indicates a read-style analysis behavior, but it does not disclose limitations, required inputs, or output format.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.