diff --git a/litellm/responses/litellm_completion_transformation/transformation.py b/litellm/responses/litellm_completion_transformation/transformation.py
index 6b1ca3564e3..b627cf26543 100644
--- a/litellm/responses/litellm_completion_transformation/transformation.py
+++ b/litellm/responses/litellm_completion_transformation/transformation.py
@@ -1307,7 +1307,14 @@ class LiteLLMCompletionResponsesConfig:
                     chat_completion_tools.append(converted)
             else:
                 _tool_type = tool.get("type")
-                if _tool_type in ("computer_use", "image_generation", "namespace", "shell"):
+                if _tool_type in (
+                    "computer_use",
+                    "image_generation",
+                    "local_shell",
+                    "namespace",
+                    "shell",
+                    "tool_search",
+                ):
                     # Drop unsupported Responses-API-only tool types that have no
                     # Chat Completions equivalent. Passing them through verbatim
                     # causes providers to reject the request with "'function' is a
diff --git a/tests/test_litellm/responses/litellm_completion_transformation/test_litellm_completion_responses.py b/tests/test_litellm/responses/litellm_completion_transformation/test_litellm_completion_responses.py
index d8e3f495ced..66285509128 100644
--- a/tests/test_litellm/responses/litellm_completion_transformation/test_litellm_completion_responses.py
+++ b/tests/test_litellm/responses/litellm_completion_transformation/test_litellm_completion_responses.py
@@ -1095,6 +1095,57 @@ class TestToolTransformation:
         assert len(result_tools) == 0
         assert web_search_options is None
 
+    def test_transform_codex_namespace_and_tool_search_tools_dropped(self):
+        """Codex CLI (Responses wire) sends `namespace` and `tool_search` tools that
+        have no Chat Completions equivalent. Forwarding them verbatim made chat-only
+        providers such as Nvidia NIM reject the whole request with
+        `unknown variant 'namespace', expected 'function'` (issue #33779). The bridge
+        must drop them while keeping real function tools."""
+        tools = [
+            {
+                "type": "function",
+                "name": "shell",
+                "description": "run a shell command",
+                "parameters": {"type": "object", "properties": {}},
+            },
+            {
+                "type": "namespace",
+                "name": "mcp__server",
+                "description": "grouped tools",
+                "tools": [
+                    {
+                        "type": "function",
+                        "name": "do_thing",
+                        "description": "d",
+                        "strict": False,
+                        "parameters": {"type": "object", "properties": {}},
+                    }
+                ],
+            },
+            {
+                "type": "tool_search",
+                "execution": "client",
+                "description": "search available tools",
+                "parameters": {"type": "object", "properties": {}},
+            },
+            {"type": "local_shell"},
+        ]
+
+        (
+            result_tools,
+            web_search_options,
+        ) = LiteLLMCompletionResponsesConfig.transform_responses_api_tools_to_chat_completion_tools(
+            tools=tools
+        )
+
+        assert web_search_options is None
+        assert len(result_tools) == 1
+        assert result_tools[0]["type"] == "function"
+        assert result_tools[0]["function"]["name"] == "shell"
+        assert all(t.get("type") != "namespace" for t in result_tools)
+        assert all(t.get("type") != "tool_search" for t in result_tools)
+        assert all(t.get("type") != "local_shell" for t in result_tools)
+
     def test_transform_custom_tools_to_function_tools(self):
         """Test that custom (freeform/grammar) tools are converted to function tools"""
         custom_tool = {