Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already establish readOnly, idempotent, closed-world behavior, so the description only needs to add scope. It does: it discloses that sprints are counted, that the points table is 'today's', and that the analysis is limited to remaining races and title possibility. It stops short of describing result shape or whether all drivers are returned versus only mathematical contenders.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.