Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description must bear the full burden of behavioral disclosure. 'Get details' implies a read-only operation, and 'including its user stories' adds return content context. However, it does not explicitly state non-mutating behavior, potential errors, or permission requirements.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.