Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries full behavioral disclosure burden but offers only the vague '(Compatibility tool)' hint without explaining what compatibility mode entails, return format, pagination, or side effects. The timeoutMs parameter suggests potential blocking behavior that should have been disclosed.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.