Refactor web search tool decorator in agent.py from @tools to @tool for improved clarity and consistency.

agent.py

@@ -4,7 +4,7 @@ from langchain_core import tools
 from langgraph.graph import StateGraph, START, END
 from langchain_huggingface import ChatHuggingFace, HuggingFaceEndpoint, HuggingFacePipeline
 from langchain_core.messages import HumanMessage, AIMessage
-from langchain_core.tools import Tool
+from langchain_core.tools import tool
 from duckduckgo_search import DDGS
 from dotenv import load_dotenv
 
@@ -22,7 +22,7 @@ base_llm = HuggingFaceEndpoint(
 # Chat model that works with LangGraph
 model = ChatHuggingFace(llm=base_llm)
 
-@tools
+@tool
 def web_search(keywords: str, max_results:int = 5) -> str:
     """
     Uses duckduckgo to search the web