Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the full behavioral burden. It says 'remove' but not whether the removal is irreversible, whether an active session is terminated cleanly, what happens to the associated memory or resources, or what error occurs for an invalid sessionId. For a destructive operation with zero annotation coverage, this is thin.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.