diff --git a/libs/core/tests/unit_tests/runnables/test_runnable.py b/libs/core/tests/unit_tests/runnables/test_runnable.py
index 8309ab128a3..52c68271bae 100644
--- a/libs/core/tests/unit_tests/runnables/test_runnable.py
+++ b/libs/core/tests/unit_tests/runnables/test_runnable.py
@@ -2373,6 +2373,7 @@ async def test_prompt_with_llm_parser(
                     "metadata": {
                         "ls_model_type": "llm",
                         "ls_provider": "fakestreaminglist",
+                        "ls_tools_called": [],
                     },
                     "name": "FakeStreamingListLLM",
                     "start_time": "2023-01-01T00:00:00.000+00:00",
diff --git a/libs/core/tests/unit_tests/tracers/test_async_base_tracer.py b/libs/core/tests/unit_tests/tracers/test_async_base_tracer.py
index 1b243c03816..2f8ff5ae54f 100644
--- a/libs/core/tests/unit_tests/tracers/test_async_base_tracer.py
+++ b/libs/core/tests/unit_tests/tracers/test_async_base_tracer.py
@@ -63,7 +63,7 @@ async def test_tracer_llm_run() -> None:
             {"name": "start", "time": datetime.now(timezone.utc)},
             {"name": "end", "time": datetime.now(timezone.utc)},
         ],
-        extra={},
+        extra={"metadata": {"ls_tools_called": []}},
         serialized=SERIALIZED,
         inputs={"prompts": []},
         outputs=LLMResult(generations=[[]]),  # type: ignore[arg-type]
@@ -96,7 +96,7 @@ async def test_tracer_chat_model_run() -> None:
             {"name": "start", "time": datetime.now(timezone.utc)},
             {"name": "end", "time": datetime.now(timezone.utc)},
         ],
-        extra={},
+        extra={"metadata": {"ls_tools_called": []}},
         serialized=SERIALIZED_CHAT,
         inputs={"prompts": ["Human: "]},
         outputs=LLMResult(generations=[[]]),  # type: ignore[arg-type]
@@ -132,7 +132,7 @@ async def test_tracer_multiple_llm_runs() -> None:
             {"name": "start", "time": datetime.now(timezone.utc)},
             {"name": "end", "time": datetime.now(timezone.utc)},
         ],
-        extra={},
+        extra={"metadata": {"ls_tools_called": []}},
         serialized=SERIALIZED,
         inputs={"prompts": []},
         outputs=LLMResult(generations=[[]]),  # type: ignore[arg-type]
@@ -289,7 +289,7 @@ async def test_tracer_nested_run() -> None:
                             {"name": "start", "time": datetime.now(timezone.utc)},
                             {"name": "end", "time": datetime.now(timezone.utc)},
                         ],
-                        extra={},
+                        extra={"metadata": {"ls_tools_called": []}},
                         serialized=SERIALIZED,
                         inputs={"prompts": []},
                         outputs=LLMResult(generations=[[]]),  # type: ignore[arg-type]
@@ -309,7 +309,7 @@ async def test_tracer_nested_run() -> None:
                     {"name": "start", "time": datetime.now(timezone.utc)},
                     {"name": "end", "time": datetime.now(timezone.utc)},
                 ],
-                extra={},
+                extra={"metadata": {"ls_tools_called": []}},
                 serialized=SERIALIZED,
                 inputs={"prompts": []},
                 outputs=LLMResult(generations=[[]]),  # type: ignore[arg-type]
@@ -524,7 +524,7 @@ async def test_tracer_nested_runs_on_error() -> None:
                     {"name": "start", "time": datetime.now(timezone.utc)},
                     {"name": "end", "time": datetime.now(timezone.utc)},
                 ],
-                extra={},
+                extra={"metadata": {"ls_tools_called": []}},
                 serialized=SERIALIZED,
                 error=None,
                 inputs={"prompts": []},
@@ -542,7 +542,7 @@ async def test_tracer_nested_runs_on_error() -> None:
                     {"name": "start", "time": datetime.now(timezone.utc)},
                     {"name": "end", "time": datetime.now(timezone.utc)},
                 ],
-                extra={},
+                extra={"metadata": {"ls_tools_called": []}},
                 serialized=SERIALIZED,
                 error=None,
                 inputs={"prompts": []},
diff --git a/libs/core/tests/unit_tests/tracers/test_base_tracer.py b/libs/core/tests/unit_tests/tracers/test_base_tracer.py
index aaa34a662f2..a757cb4dee4 100644
--- a/libs/core/tests/unit_tests/tracers/test_base_tracer.py
+++ b/libs/core/tests/unit_tests/tracers/test_base_tracer.py
@@ -68,7 +68,7 @@ def test_tracer_llm_run() -> None:
             {"name": "start", "time": datetime.now(timezone.utc)},
             {"name": "end", "time": datetime.now(timezone.utc)},
         ],
-        extra={},
+        extra={"metadata": {"ls_tools_called": []}},
         serialized=SERIALIZED,
         inputs={"prompts": []},
         outputs=LLMResult(generations=[[]]),  # type: ignore[arg-type]
@@ -101,7 +101,7 @@ def test_tracer_chat_model_run() -> None:
             {"name": "start", "time": datetime.now(timezone.utc)},
             {"name": "end", "time": datetime.now(timezone.utc)},
         ],
-        extra={},
+        extra={"metadata": {"ls_tools_called": []}},
         serialized=SERIALIZED_CHAT,
         inputs={"prompts": ["Human: "]},
         outputs=LLMResult(generations=[[]]),  # type: ignore[arg-type]
@@ -137,7 +137,7 @@ def test_tracer_multiple_llm_runs() -> None:
             {"name": "start", "time": datetime.now(timezone.utc)},
             {"name": "end", "time": datetime.now(timezone.utc)},
         ],
-        extra={},
+        extra={"metadata": {"ls_tools_called": []}},
         serialized=SERIALIZED,
         inputs={"prompts": []},
         outputs=LLMResult(generations=[[]]),  # type: ignore[arg-type]
@@ -292,7 +292,7 @@ def test_tracer_nested_run() -> None:
                             {"name": "start", "time": datetime.now(timezone.utc)},
                             {"name": "end", "time": datetime.now(timezone.utc)},
                         ],
-                        extra={},
+                        extra={"metadata": {"ls_tools_called": []}},
                         serialized=SERIALIZED,
                         inputs={"prompts": []},
                         outputs=LLMResult(generations=[[]]),  # type: ignore[arg-type]
@@ -312,7 +312,7 @@ def test_tracer_nested_run() -> None:
                     {"name": "start", "time": datetime.now(timezone.utc)},
                     {"name": "end", "time": datetime.now(timezone.utc)},
                 ],
-                extra={},
+                extra={"metadata": {"ls_tools_called": []}},
                 serialized=SERIALIZED,
                 inputs={"prompts": []},
                 outputs=LLMResult(generations=[[]]),  # type: ignore[arg-type]
@@ -525,7 +525,7 @@ def test_tracer_nested_runs_on_error() -> None:
                     {"name": "start", "time": datetime.now(timezone.utc)},
                     {"name": "end", "time": datetime.now(timezone.utc)},
                 ],
-                extra={},
+                extra={"metadata": {"ls_tools_called": []}},
                 serialized=SERIALIZED,
                 error=None,
                 inputs={"prompts": []},
@@ -543,7 +543,7 @@ def test_tracer_nested_runs_on_error() -> None:
                     {"name": "start", "time": datetime.now(timezone.utc)},
                     {"name": "end", "time": datetime.now(timezone.utc)},
                 ],
-                extra={},
+                extra={"metadata": {"ls_tools_called": []}},
                 serialized=SERIALIZED,
                 error=None,
                 inputs={"prompts": []},