Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are present, so the description carries the burden. It states 'List' which indicates a read-only operation, and 'all groups' conveys scope. However, it doesn't disclose pagination, response format, or the effect of the optional fields and metadata parameters.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.