Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint and idempotentHint, so the safety profile is known. The description adds the specific return content (URL and availability) but does not disclose prerequisites or edge cases (e.g., what happens when the dashboard is unavailable). This adds some value beyond annotations but not rich context.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.