From 3463d839378c8c4e6d9e2acac3023479a9f7cffa Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Gau=C2=B7Beo?= <thinhnx128@gmail.com>
Date: Sat, 7 Nov 2026 17:20:07 +0700
Subject: [PATCH] fix(mcpserver): honor warn_on_duplicate_resources in
 ResourceManager.add_template (#3813)

---
 src/mcp/server/mcpserver/resources/resource_manager.py | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/mcp/server/mcpserver/resources/resource_manager.py b/src/mcp/server/mcpserver/resources/resource_manager.py
index e56e3ba177..fca5fd7402 100644
--- a/src/mcp/server/mcpserver/resources/resource_manager.py
+++ b/src/mcp/server/mcpserver/resources/resource_manager.py
@@ -83,6 +83,11 @@ def add_template(
             meta=meta,
             security=security,
         )
+        existing = self._templates.get(template.uri_template)
+        if existing:
+            if self.warn_on_duplicate_resources:
+                logger.warning(f"Template already exists: {template.uri_template}")
+            return existing
         self._templates[template.uri_template] = template
         return template