Discover crawler rules

Rules are the stable vocabulary connecting crawl issues, summaries, affected URLs, and remediation guidance. Listing them answers "which checks exist?" It does not say that a site triggered those checks or that every listed convention is a search-engine requirement.

Run it

For MCP, use seo_list_reports with category crawl only if report discovery is needed. Call seo_describe_report with { "id": "list-rules" }, then seo_run_report with:

{
  "id": "list-rules",
  "params": { "category": "metadata" }
}

Read structuredContent after checking isError. CLI parity is: