Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden, but it only states the action without disclosing any behavioral details such as read-only nature beyond the verb, error conditions, or what exactly constitutes the 'latest log'. No side effects, permissions, or response characteristics are described.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.