Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already provide readOnlyHint=true, openWorldHint=true, and idempotentHint=true, so the safety profile is well covered. The description adds the scoping detail of 'direct role assignments' but does not disclose behavioral traits such as pagination, default limits, or how disabled_only interacts with results. This is acceptable given the annotations, but not particularly informative.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.