Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnly, idempotent, non-destructive, open-world, so the description could have used its space for what the backup contains, whether it is a file download or JSON payload, size/side effects, or auth requirements. It instead only echoes the HTTP route, adding essentially no behavior beyond structured fields.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.