diff --git a/basedpyright-code-budget.json b/basedpyright-code-budget.json
index 9997e5dc0c6..f38eb29be84 100644
--- a/basedpyright-code-budget.json
+++ b/basedpyright-code-budget.json
@@ -123,7 +123,7 @@
     "limit": 5
   },
   "reportUnnecessaryIsInstance": {
-    "limit": 823
+    "limit": 822
   },
   "reportUntypedBaseClass": {
     "limit": 0
diff --git a/tests/test_litellm/llms/openai/responses/test_openai_responses_guardrail_handler.py b/tests/test_litellm/llms/openai/responses/test_openai_responses_guardrail_handler.py
index 7e624f39c53..fe54bb8c72a 100644
--- a/tests/test_litellm/llms/openai/responses/test_openai_responses_guardrail_handler.py
+++ b/tests/test_litellm/llms/openai/responses/test_openai_responses_guardrail_handler.py
@@ -1406,6 +1406,21 @@ class TestOpenAIResponsesHandlerNamespaceTools:
 
         assert result["tools"] == tools
 
+    @pytest.mark.asyncio
+    async def test_namespace_with_unparseable_members_is_kept_once_and_unchanged(self):
+        handler = OpenAIResponsesHandler()
+        namespace_tool = {"type": "namespace", "name": "mcp__odd", "tools": ["confluence_get_page"]}
+        data = {
+            "input": [{"role": "user", "content": "fetch page 1", "type": "message"}],
+            "tools": [dict(namespace_tool)],
+            "model": "gpt-5.3-codex",
+        }
+
+        result = await handler.process_input_messages(data, ToolAppendingGuardrail(guardrail_name="test"))
+
+        assert result["tools"][0] == namespace_tool
+        assert [t["name"] for t in result["tools"]] == ["mcp__odd", "injected_tool"]
+
     @pytest.mark.asyncio
     async def test_guardrail_can_still_drop_a_single_namespace_member(self):
         handler = OpenAIResponsesHandler()
diff --git a/type-discipline-budget.json b/type-discipline-budget.json
index 07bc874880f..4e7d7490fc8 100644
--- a/type-discipline-budget.json
+++ b/type-discipline-budget.json
@@ -1,9 +1,9 @@
 {
   "LIT001": {
-    "limit": 22352
+    "limit": 22346
   },
   "LIT002": {
-    "limit": 26774
+    "limit": 26773
   },
   "LIT003": {
     "limit": 269
@@ -27,7 +27,7 @@
     "limit": 0
   },
   "LIT010": {
-    "limit": 16504
+    "limit": 16503
   },
   "LIT011": {
     "limit": 5535