Update tool.py

tool.py

@@ -98,7 +98,7 @@ duckduckgo = DuckDuckGoSearchResults()
 tavily = TavilySearchResults(max_results=3)
 
 @tool
-def combined_web_search(query: str) -> dict:
+def combined_web_search(query: str) -> str:
     """Search Google, DuckDuckGo, and Tavily for a query and return combined results."""
 
     google_docs = google.invoke(query)[:3]