docs(P19MCP1): 落地MCP只读工具链基准与校验脚本

.mcp.json.example

@@ -0,0 +1,12 @@
+{
+  "mcpServers": {
+    "postgres": {
+      "command": "npx",
+      "args": [
+        "-y",
+        "@modelcontextprotocol/server-postgres",
+        "postgresql://<READONLY_USER>:<PASSWORD>@<HOST>:<PORT>/<DB>"
+      ]
+    }
+  }
+}