docs: add web search to anthropic docs (#31169)

docs/docs/integrations/chat/anthropic.ipynb

@@ -67,7 +67,9 @@
    "cell_type": "markdown",
    "id": "72ee0c4b-9764-423a-9dbf-95129e185210",
    "metadata": {},
-      "source": "To enable automated tracing of your model calls, set your [LangSmith](https://docs.smith.langchain.com/) API key:"
+   "source": [
+    "To enable automated tracing of your model calls, set your [LangSmith](https://docs.smith.langchain.com/) API key:"
+   ]
   },
   {
    "cell_type": "code",
@@ -914,6 +916,43 @@
     "Anthropic supports a variety of [built-in tools](https://docs.anthropic.com/en/docs/build-with-claude/tool-use/text-editor-tool), which can be bound to the model in the [usual way](/docs/how_to/tool_calling/). Claude will generate tool calls adhering to its internal schema for the tool:"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "id": "74988918-f740-4cf6-a02c-7ea8f1927740",
+   "metadata": {},
+   "source": [
+    "### Web search\n",
+    "\n",
+    "Claude can use a [web search tool](https://docs.anthropic.com/en/docs/build-with-claude/tool-use/web-search-tool) to run searches and ground its responses with citations."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "id": "a83d4c91-9b7c-49ad-86d6-11a8fdc781b6",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "from langchain_anthropic import ChatAnthropic\n",
+    "\n",
+    "llm = ChatAnthropic(model=\"claude-3-5-sonnet-latest\")\n",
+    "\n",
+    "tool = {\"type\": \"web_search_20250305\", \"name\": \"web_search\", \"max_uses\": 3}\n",
+    "llm_with_tools = llm.bind_tools([tool])\n",
+    "\n",
+    "response = llm_with_tools.invoke(\"How do I update a web app to TypeScript 5.5?\")"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "2fd5d545-a40d-42b1-ad0c-0a79e2536c9b",
+   "metadata": {},
+   "source": [
+    "### Text editor\n",
+    "\n",
+    "The text editor tool can be used to view and modify text files. See docs [here](https://docs.anthropic.com/en/docs/build-with-claude/tool-use/text-editor-tool) for details."
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": 1,

libs/partners/anthropic/langchain_anthropic/chat_models.py

@@ -866,6 +866,23 @@ class ChatAnthropic(BaseChatModel):
         See LangChain `docs <https://python.langchain.com/docs/integrations/chat/anthropic/>`_
         for more detail.
 
+        Web search:
+
+            .. code-block:: python
+
+                from langchain_anthropic import ChatAnthropic
+
+                llm = ChatAnthropic(model="claude-3-5-sonnet-latest")
+
+                tool = {"type": "web_search_20250305", "name": "web_search", "max_uses": 3}
+                llm_with_tools = llm.bind_tools([tool])
+
+                response = llm_with_tools.invoke(
+                    "How do I update a web app to TypeScript 5.5?"
+                )
+
+        Text editor:
+
             .. code-block:: python
 
                 from langchain_anthropic import ChatAnthropic