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 revealing behavioral traits. It only states that it lists invoices and can filter; it does not disclose whether the operation is read-only, any side effects, authentication requirements, or pagination behavior. This is a significant gap for a tool with no annotation support.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.