Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true and openWorldHint=true, so the safety profile is covered and the description only needs to add extra context. It adds the input-domain constraint (must be a canonical scorecard/live-score URL), but says nothing about rate limits, fetch failures, or how live vs. finished matches differ in the response. Adequate but thin for an open-world fetch.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.