Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true and openWorldHint=false, covering the safety profile. The description adds that the output is markdown and the id source, but doesn't disclose additional behavioral traits such as pagination or error handling. Since annotations carry the main transparency load, the added value is modest.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.