Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true and openWorldHint=true, so safety is covered; the description adds that results are grouped by team and carry position and status, which is useful since no output schema exists. It says nothing about permissions, whether the plan must be active/published, or the openWorldHint implication that data may come from external systems.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.