Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true and openWorldHint=true, so the read-only and open-ended nature is covered. The description adds the context that resources are 'live' and 'public', which slightly expands on the annotations, but it does not disclose behavior like pagination, response format, or what happens when no sport filter is provided.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.