Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the burden of behavioral disclosure. It only states 'Get alert instance by id,' implying a read-only operation but fails to disclose potential side effects, response format, required permissions, or rate limits. For a simple get-by-id, more context like 'returns the full alert object' would be helpful.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.