Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true and openWorldHint=false, and the description aligns with that by framing the operation as a read. It adds useful behavioral context by disclosing the returned content categories, including videos as URLs, which is beyond what annotations provide. It does not discuss error behavior or auth, but those are less critical for a simple read tool.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.