Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare read-only, idempotent, and non-destructive behavior. The description adds useful conditional context: authenticated state vs. missing credentials and the corresponding URLs. It does not contradict the annotations and provides meaningful behavioral detail beyond the structured metadata.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.