Replaces single-vendor (Ahrefs-only) tool defaults with a per-task backend menu across all 14 SEO skills. Each skill now lists every capable MCP in allowed-tools and documents how to pick between Semrush, Ahrefs, OurSEO Agent (CLI + MCP), DataForSEO, and GSC in its SKILL.md Data Source Selection section. Tool stubs (~40 new files) populated per skill with capability deltas, call patterns, and explicit "not for this skill when" callouts so the menu is self-correcting. Skills affected: 19-keyword-strategy, 20-serp-analysis, 21-position-tracking, 22-link-building, 23-content-strategy, 24-ecommerce, 25-kpi-framework, 26-international, 27-ai-visibility, 28-knowledge-graph, 31-competitor-intel, 32-crawl-budget, 33-migration-planner, 34-reporting-dashboard. Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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Semrush MCP
Alternative third-party site audit when no Ahrefs project exists for the domain.
Call pattern: discovery → get_report_schema → execute_report.
Key report
siteaudit_research— site-wide audit catching redirect chains, parameter URLs, thin content, broken links
Example
mcp__semrush__siteaudit_research(query="<domain>", database="us")
mcp__semrush__get_report_schema(report_id="<id>")
mcp__semrush__execute_report(report_id="<id>", params={...})
When Semrush is useful here
- No Ahrefs Site Audit project — Semrush is the quickest alternative.
- User is already in Semrush context.
- Cross-vendor verification of orphan / redirect-chain counts.
Not for this skill when
- Actual bot behaviour at the origin — server access logs (Nginx/Apache/CloudFront) only.
- First-party Googlebot crawl stats — GSC.
- Korean bot analysis (Yeti/Naver, Daumoa/Kakao) — Semrush underrepresents these. Use logs.
- An Ahrefs project already exists — prefer Ahrefs
site-audit-*for historical continuity.