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 states the operation type and explicitly says 'No filters,' which is helpful, but it does not mention pagination, response format, authentication requirements, or the potential size of the returned dataset. For a simple read-only list this is minimally adequate but not fully transparent.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.