Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries full burden. 'Create a new navigation menu' implies a write/mutation operation, but it doesn't disclose behavioral traits like required permissions, whether menus can be created with specific settings or locations, what happens if a menu with the same name exists, or what the tool returns. This leaves significant gaps for an agent to understand how to use it effectively.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.