Update app.py

app.py

@@ -9,14 +9,32 @@ from Gradio_UI import GradioUI
 
 # Below is an example of a tool that does nothing. Amaze us with your creativity !
 @tool
-def my_custom_tool(arg1:str, arg2:int)-> str: #it's import to specify the return type
-    #Keep this format for the description / args / args description but feel free to modify the tool
-    """A tool that does nothing yet 
+def my_custom_tool(arg1: str, arg2: int) -> str:
+    """A tool that searches for 3 PDF files related to the user's request using DuckDuckGoSearchTool.
+    
     Args:
-        arg1: the first argument
-        arg2: the second argument
+        arg1: the first argument (string), interpreted as the search query.
+        arg2: the second argument (integer), potentially controlling how many results to fetch.
     """
-    return "What magic will you build ?"
+    # We'll use DuckDuckGoSearchRun from langchain to perform the actual search.
+    search = DuckDuckGoSearchRun()
+
+    # Construct the query, searching specifically for PDF documents.
+    query = f"{arg1} filetype:pdf"
+
+    # Use arg2 to limit the number of results to fetch (if you prefer, you can hardcode num_results=3).
+    num_results = min(arg2, 3) if arg2 > 0 else 3
+
+    # Execute the search
+    results = search.run(query, num_results=num_results)
+
+    # If results is a string describing the search outcome, just return it.
+    # If results is a list of links, you might parse them. For simplicity, we'll cast it to string and return.
+    if not results:
+        return "No PDF files found."
+    
+    # Convert the results to a string for returning; you can format or parse further if desired.
+    return f"Top {num_results} PDF results for '{arg1}':\n\n{str(results)}"
 
 @tool
 def get_current_time_in_timezone(timezone: str) -> str: