Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full burden of behavioral disclosure. It states the tool retrieves a summary but doesn't clarify if this is a read-only operation, whether it affects the session state, what format the output takes, or any limitations (e.g., session must be active). This leaves significant gaps for a tool that likely interacts with session data.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.