Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true and openWorldHint=true, so the agent knows this is a safe, external read. The description adds the word 'normalized', hinting at reshaped output, but does not mention the default-URI fallback behavior (the schema notes a default worth surfacing) or rate limits.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.