refactor(docs): update agent integration examples for Serpex in JavaScript and Python

Author: divyeshradadiya

src/oss/javascript/integrations/tools/serpex_search_js.mdx

@@ -87,12 +87,11 @@ console.log(toolMsg.content.substring(0, 500));
 
 ## Use within an agent
 
-We can use our tools directly with an agent executor by binding the tool to the agent. This gives the agent the ability to dynamically search for information.
+We can use our tools directly with an agent by creating an agent with the tool. This gives the agent the ability to dynamically search for information.
 
 ```typescript
 import { ChatOpenAI } from "@langchain/openai";
-import { AgentExecutor, createOpenAIFunctionsAgent } from "langchain/agents";
-import { ChatPromptTemplate } from "@langchain/core/prompts";
+import { createAgent } from "langchain";
 import { Serpex } from "langchain-serpex-js";
 
 // Initialize the search tool
@@ -105,26 +104,14 @@ const searchTool = new Serpex("your-serpex-api-key", {
 const llm = new ChatOpenAI({ model: "gpt-4", temperature: 0 });
 
 // Create an agent with the search tool
-const prompt = ChatPromptTemplate.fromMessages([
-  ["system", "You are a helpful assistant."],
-  ["human", "{input}"],
-  ["human", "{agent_scratchpad}"]
-]);
-
-const agent = await createOpenAIFunctionsAgent({
-  llm,
+const agent = createAgent({
+  model: llm,
   tools: [searchTool],
-  prompt
-});
-
-const executor = new AgentExecutor({
-  agent,
-  tools: [searchTool]
 });
 
 // Run the agent
-const result = await executor.invoke({
-  input: "What are the latest developments in renewable energy?"
+const result = await agent.invoke({
+  messages: [{ role: "user", content: "What are the latest developments in renewable energy?" }]
 });
 
 console.log(result);

src/oss/python/integrations/providers/serpex-python.mdx

@@ -13,14 +13,3 @@ This page covers how to use the Serpex search APIs within LangChain.
 ### Tool
 
 For usage examples and reference for the Serpex wrappers and tools, see [the Serpex tools page](/oss/python/integrations/tools/serpex_search_python).
-
-### Tool (Agent)
-
-You can also load Serpex as a Tool to use with an Agent:
-
-```python
-from langchain_community.agent_toolkits.load_tools import load_tools
-tools = load_tools(["serpex_search_python"])
-```
-
-For more information on loading tools, see [the tools documentation](/oss/integrations/tools).