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 merely states the action but does not disclose pagination, ordering, rate limits, permission requirements, or what data is included (e.g., whether attachments or system messages are included). Without any behavioral context, the agent cannot anticipate the tool's exact behavior beyond the obvious read operation.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.