diff --git a/packages/toolbox-langchain/README.md b/packages/toolbox-langchain/README.md
index 478bd087..42146d7c 100644
--- a/packages/toolbox-langchain/README.md
+++ b/packages/toolbox-langchain/README.md
@@ -231,27 +231,16 @@ that fresh credentials or header values can be used.
 
 ### Configuration
 
-You can configure these dynamic headers in two ways:
+You can configure these dynamic headers as follows:
 
-1. **During Client Initialization**
-
-    ```python
-    from toolbox_langchain import ToolboxClient
-
-    client = ToolboxClient(
-        "toolbox-url", 
-        client_headers={"header1": header1_getter, "header2": header2_getter, ...}
-    )
-    ```
-
-1. **After Client Initialization**
-
-    ```python
-    from toolbox_langchain import ToolboxClient
+```python
+from toolbox_langchain import ToolboxClient
 
-    client = ToolboxClient("toolbox-url")
-    client.add_headers({"header1": header1_getter, "header2": header2_getter, ...})
-    ```
+client = ToolboxClient(
+    "toolbox-url", 
+    client_headers={"header1": header1_getter, "header2": header2_getter, ...}
+)
+```
 
 ### Authenticating with Google Cloud Servers
 
diff --git a/packages/toolbox-langchain/src/toolbox_langchain/async_client.py b/packages/toolbox-langchain/src/toolbox_langchain/async_client.py
index a29bfb85..4757188d 100644
--- a/packages/toolbox-langchain/src/toolbox_langchain/async_client.py
+++ b/packages/toolbox-langchain/src/toolbox_langchain/async_client.py
@@ -190,18 +190,3 @@ def load_toolset(
         strict: bool = False,
     ) -> list[AsyncToolboxTool]:
         raise NotImplementedError("Synchronous methods not supported by async client.")
-
-    def add_headers(
-        self,
-        headers: Mapping[str, Union[Callable[[], str], Callable[[], Awaitable[str]]]],
-    ) -> None:
-        """
-        Add headers to be included in each request sent through this client.
-
-        Args:
-            headers: Headers to include in each request sent through this client.
-
-        Raises:
-            ValueError: If any of the headers are already registered in the client.
-        """
-        self.__core_client.add_headers(headers)
diff --git a/packages/toolbox-langchain/src/toolbox_langchain/client.py b/packages/toolbox-langchain/src/toolbox_langchain/client.py
index 19cb60d0..00dc9c4d 100644
--- a/packages/toolbox-langchain/src/toolbox_langchain/client.py
+++ b/packages/toolbox-langchain/src/toolbox_langchain/client.py
@@ -291,18 +291,3 @@ def load_toolset(
         for core_sync_tool in core_sync_tools:
             tools.append(ToolboxTool(core_tool=core_sync_tool))
         return tools
-
-    def add_headers(
-        self,
-        headers: Mapping[str, Union[Callable[[], str], Callable[[], Awaitable[str]]]],
-    ) -> None:
-        """
-        Add headers to be included in each request sent through this client.
-
-        Args:
-            headers: Headers to include in each request sent through this client.
-
-        Raises:
-            ValueError: If any of the headers are already registered in the client.
-        """
-        self.__core_client.add_headers(headers)
diff --git a/packages/toolbox-langchain/tests/test_async_client.py b/packages/toolbox-langchain/tests/test_async_client.py
index 2e1c3f56..a0c9def5 100644
--- a/packages/toolbox-langchain/tests/test_async_client.py
+++ b/packages/toolbox-langchain/tests/test_async_client.py
@@ -350,11 +350,3 @@ async def test_init_with_client_headers(
         mock_core_client_constructor.assert_called_once_with(
             url=URL, session=mock_session, client_headers=headers
         )
-
-    async def test_add_headers(self, mock_client):
-        """Tests that add_headers calls the core client's add_headers."""
-        headers = {"X-Another-Header": lambda: "dynamic_value"}
-        mock_client.add_headers(headers)
-        mock_client._AsyncToolboxClient__core_client.add_headers.assert_called_once_with(
-            headers
-        )
diff --git a/packages/toolbox-langchain/tests/test_client.py b/packages/toolbox-langchain/tests/test_client.py
index bf42c870..73ecdb5d 100644
--- a/packages/toolbox-langchain/tests/test_client.py
+++ b/packages/toolbox-langchain/tests/test_client.py
@@ -429,12 +429,3 @@ def test_init_with_client_headers(self, mock_core_client_constructor):
         mock_core_client_constructor.assert_called_once_with(
             url=URL, client_headers=headers
         )
-
-    @patch("toolbox_langchain.client.ToolboxCoreSyncClient")
-    def test_add_headers(self, mock_core_client_constructor):
-        """Tests that add_headers calls the core client's add_headers."""
-        mock_core_instance = mock_core_client_constructor.return_value
-        client = ToolboxClient(URL)
-        headers = {"X-Another-Header": "dynamic_value"}
-        client.add_headers(headers)
-        mock_core_instance.add_headers.assert_called_once_with(headers)