Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full behavioral disclosure burden, but it only states a concept. It does not disclose that the tool is read-only, what the output looks like, what units are used, or any underlying assumptions—leaving the agent to infer actual behavior.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.