docs(search): record routing policy and fallback tuning

TOOLS.md

@@ -45,6 +45,16 @@ Skills are shared. Your setup is yours. Keeping them apart means you can update
 - Tailscale IP:
   - `100.123.88.127`
 
+### Search routing
+
+- Default page-reading tool: native `web_fetch`
+- Default search path: `skills/local-meta-search/scripts/search.sh`
+- Routing policy:
+  - use **SearXNG first** for normal web lookups
+  - fall back to **Brave MCP** if SearXNG fails or returns weak/empty results
+  - use **Brave MCP directly** when Will explicitly asks for Brave / a second opinion
+- Backend labels should be called out in research answers when relevant
+
 ### Docker services
 
 - **searxng**