Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Without annotations, the description carries full behavioral burden. It indicates a read-only list operation but does not disclose whether it requires special permissions, whether it returns only user-created or system-default profiles, or if there are any side effects. The description is too minimal.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.