Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description bears the burden of behavioral disclosure. It does add meaningful behavioral context: domain properties cover all subdomains, and sitemap_index lists child sitemaps. It does not mention auth requirements, rate limits, or explicitly confirm that the operation is read-only, though 'List' suggests it.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.