Update tools.py

tools.py

@@ -1,6 +1,7 @@
 from langchain_core.tools import tool
 from langchain_community.tools.tavily_search import TavilySearchResults
 from youtube_transcript_api import YouTubeTranscriptApi
+from langchain_community.document_loaders import WikipediaLoader
 
 @tool
 def add(a: int, b: int) -> int:
@@ -62,6 +63,20 @@ def web_search(query: str) -> str:
         ])
     return {"web_results": formatted_search_docs}
 
+@tool
+def wiki_search(query: str) -> str:
+    """Search Wikipedia for a query and return maximum 2 results.
+    
+    Args:
+        query: The search query."""
+    search_docs = WikipediaLoader(query=query, load_max_docs=2).load()
+    formatted_search_docs = "\n\n---\n\n".join(
+        [
+            f'<Document source="{doc.metadata["source"]}" page="{doc.metadata.get("page", "")}"/>\n{doc.page_content}\n</Document>'
+            for doc in search_docs
+        ])
+    return {"wiki_results": formatted_search_docs}
+
 @tool
 def fetch_youtube_transcript(video_url: str) -> str:
     """