diff --git a/src/pydantic_ai_lightspeed/llamastack/_model.py b/src/pydantic_ai_lightspeed/llamastack/_model.py
index 781af26b7..019652d5c 100644
--- a/src/pydantic_ai_lightspeed/llamastack/_model.py
+++ b/src/pydantic_ai_lightspeed/llamastack/_model.py
@@ -53,7 +53,6 @@
     {
         "conversation",
         "max_infer_iters",
-        "tools",
         "tool_choice",
         "include",
         "text",
@@ -84,6 +83,8 @@ def _model_settings_from_responses_params(
     if responses_params.extra_headers:
         settings_dict["extra_headers"] = dict(responses_params.extra_headers)
     settings_dict["openai_store"] = responses_params.store
+    if responses_params.tools is not None:
+        settings_dict["openai_native_tools"] = responses_params.tools
     if responses_params.previous_response_id is not None:
         settings_dict["openai_previous_response_id"] = (
             responses_params.previous_response_id
diff --git a/tests/unit/pydantic_ai_lightspeed/llamastack/test_model.py b/tests/unit/pydantic_ai_lightspeed/llamastack/test_model.py
index 271a00fbe..191b8a2b9 100644
--- a/tests/unit/pydantic_ai_lightspeed/llamastack/test_model.py
+++ b/tests/unit/pydantic_ai_lightspeed/llamastack/test_model.py
@@ -86,7 +86,6 @@ def test_extra_body_fields(self) -> None:
         params = _make_params(
             max_infer_iters=5,
             max_tool_calls=10,
-            tools=[{"type": "function", "name": "test-function", "parameters": {}}],
         )
         settings = _model_settings_from_responses_params(params)
 
@@ -95,9 +94,16 @@ def test_extra_body_fields(self) -> None:
         assert settings["extra_body"]["max_infer_iters"] == 5
         assert settings["extra_body"]["max_tool_calls"] == 10
         assert settings["extra_body"]["conversation"] == "conv-1"
-        assert settings["extra_body"]["tools"] == [
-            {"type": "function", "name": "test-function", "parameters": {}}
-        ]
+
+    def test_tools_maps_to_openai_native_tools(self) -> None:
+        """Test that tools maps to openai_native_tools, not extra_body."""
+        tools = [{"type": "function", "name": "test-function", "parameters": {}}]
+        params = _make_params(tools=tools)
+        settings = _model_settings_from_responses_params(params)
+
+        assert "openai_native_tools" in settings
+        assert settings["openai_native_tools"] is params.tools
+        assert "tools" not in settings.get("extra_body", {})
 
     def test_none_fields_excluded(self) -> None:
         """Test that None optional fields do not appear in the result."""
@@ -581,7 +587,6 @@ def test_contains_expected_fields(self) -> None:
         expected = {
             "conversation",
             "max_infer_iters",
-            "tools",
             "tool_choice",
             "include",
             "text",