From dd5c159b2a18dc2b3b6688a0822b142020a6f90c Mon Sep 17 00:00:00 2001
From: Davis Rens <166565828+davrens101@users.noreply.github.com>
Date: Thu, 5 Nov 2026 21:09:56 -0800
Subject: [PATCH] fix(resources): honor warn_on_duplicate_resources in
 add_template

---
 src/mcp/server/mcpserver/resources/resource_manager.py | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/mcp/server/mcpserver/resources/resource_manager.py b/src/mcp/server/mcpserver/resources/resource_manager.py
index e56e3ba177..6d635f9827 100644
--- a/src/mcp/server/mcpserver/resources/resource_manager.py
+++ b/src/mcp/server/mcpserver/resources/resource_manager.py
@@ -83,6 +83,12 @@ 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"Resource already exists: {template.uri_template}")
+            return existing
+
         self._templates[template.uri_template] = template
         return template