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. It does reveal the important destructive condition 'Both empty = clear all', but it does not state that deletion is irreversible, how name and domain narrowing works, or whether clearing cookies affects all tabs or only the current context. This leaves significant behavior unexplained for a destructive tool.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.