Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description must disclose behavioral traits, but it only states the basic function. It does not clarify critical behavior such as the order of ancestors (e.g., root to leaf or leaf to root), error handling for invalid page IDs, or whether it returns full page objects or just IDs. This leaves significant ambiguity for an agent.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.