Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Without annotations, the description should disclose behavioral traits. It only states the action, failing to mention whether the operation is read-only, requires authentication, or returns paginated results. The lack of annotations and minimal description leaves the agent without crucial behavioral context.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.