Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full burden. It simply states what the tool does without disclosing any behavioral details such as read-only nature, response format, pagination, authentication requirements, or whether it includes all item types. This leaves significant ambiguity for the agent.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.