Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description must carry the behavioral burden. It states the filtering constraints (current active sprint, current user) and implies a read-only listing, but does not disclose behavior when no active sprint exists, potential errors, or whether the result is sorted or paginated. It does add some context beyond the tool name.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.