Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries full responsibility for behavioral disclosure. It only states what it gets, not how it behaves. For instance, the parameter 'include_false_positives' implies default filtering, but the description says 'all detected loop patterns', which is misleading or at least unclear. No mention of error handling, what happens if a session doesn't exist, or return format.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.