Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full burden. It adds useful context by specifying the team scope and that read status is included in the response. However, it does not disclose potential side effects (e.g., marking notifications as read), pagination, or ordering, which are material for a list endpoint.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.