Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true and openWorldHint=true, so the safety/world profile is covered. The description adds one genuinely useful behavioral note, that results resolve a name to a slug, but says nothing about result ordering, pagination, or matching behavior. 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.