diff --git a/tools/mcp_tool.py b/tools/mcp_tool.py
index 8d1021ca1cf..b6279f70215 100644
--- a/tools/mcp_tool.py
+++ b/tools/mcp_tool.py
@@ -2489,7 +2489,7 @@ class MCPServerTask:
             # re-probing is a redundant round-trip. Also skip for OAuth servers:
             # without a cached token the endpoint returns HTML or 401, which
             # would incorrectly block the OAuth flow before it can run.
-            if config.get("transport") != "sse" and not self._ready.is_set() and self._auth_type != "oauth":
+            if config.get("transport") != "sse" and not config.get("skip_preflight") and not self._ready.is_set() and self._auth_type != "oauth":
                 try:
                     _probe_headers = dict(config.get("headers") or {})
                     await self._preflight_content_type(