modif format output

agent.py

@@ -71,7 +71,7 @@ Answer: a, b
 """
 
 @tool
-def wiki_search(query: str) -> str:
+def wiki_search(query: str) -> dict[str, str]:
     """Search Wikipedia for a query and return maximum 2 results.
 
     Args:
@@ -86,7 +86,7 @@ def wiki_search(query: str) -> str:
 
 
 @tool
-def arvix_search(query: str) -> str:
+def arvix_search(query: str) -> dict[str, str]:
     """Search Arxiv for a query and return maximum 3 result.
 
     Args:
@@ -110,7 +110,7 @@ prompt_web="""
         "- You can browse the web then give your results to your supervisor "
 """
 @tool
-def web_search_openai_tool(query: str) -> str:
+def web_search_openai_tool(query: str) -> dict[str, str]:
     """Call web search and the output is a structured text answering the query)
 
     Args: