Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the full burden of behavioral disclosure. 'Get all cookies for the current session' clearly indicates a read operation, but it does not describe the return format, whether cookies from all domains are included, or how the cookies are structured. This is a minimal disclosure with meaningful gaps.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.