Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the burden of behavioral disclosure. It states the core operation ('List all archived channels') but does not disclose pagination behavior, return format, or side effects. The schema documents limit/offset, but the description adds no additional context about what the response contains or how pagination works. For a standard list operation, this is adequate but not rich.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.