Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true and openWorldHint=true, so the description adds minimal behavioral insight beyond confirming read-only nature ('List') and external dependency ('REST API'). It does not elaborate on behavior like pagination, rate limits, or data freshness, which would add value beyond the annotations.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.