Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false and openWorldHint=false, so the safety profile is covered. The description adds one useful behavioral fact beyond that: it operates without touching account data. It says nothing about link format, failures, or auth requirements, so it earns only a middling score.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.