Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
There are no annotations, so the description carries the full burden. It only states 'active memberships,' implying a filter, but does not explain any other behavioral traits such as authentication requirements, pagination, data freshness, or what happens when no memberships exist. This is minimal disclosure.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.