MCP howto: document the Type selector (MCP vs OpenAPI) and auth field

getting-started.md

@@ -48,10 +48,13 @@ with the account you created in step 1.
   Context Protocol) servers — external tool services that let the AI do
   things like search marketplaces, query other services, or pull in
   specialized data. Every member can connect their own: go to
-  Settings → Services → Integrations → External Tool Servers, and add an
-  MCP server by its URL. In a conversation, pick the tool server from
-  the tools menu near the message box and ask away. Please review what a
-  third-party tool service does with your data before connecting it.
+  Settings → Services → Integrations → External Tool Servers, click add,
+  set **Type** to **MCP** (the default is OpenAPI, which is a different
+  protocol — MCP URLs will fail as OpenAPI), enter the server's URL, and set
+  auth per that service's instructions (often a Bearer token from your account
+  there). In a conversation, pick the tool server from the tools menu near
+  the message box and ask away. Please review what a third-party tool
+  service does with your data before connecting it.
 
 Your usage draws from your monthly allowance; you can see it on the 
 [Member Dashboard](https://dashboard.inference.coop).