fix for correct invocation of file download tool via JSON action

app.py

@@ -1,6 +1,6 @@
+import requests
 import os
 import gradio as gr
-import requests
 import inspect
 import pandas as pd
 import time
@@ -12,7 +12,6 @@ from langchain.memory import ConversationSummaryMemory
 from typing import Any, List, Optional
 from langchain.agents import AgentExecutor, Agent
 from langchain.tools.base import BaseTool
-from langchain.memory import ConversationSummaryMemory
 from langchain.memory import ConversationSummaryBufferMemory
 from google.api_core import retry
 from google import genai
@@ -164,8 +163,11 @@ def run_and_submit_all( profile: gr.OAuthProfile | None):
     Action Input: [input_for_the_tool]
     Observation: [result_from_the_tool]
 
-    NOTE: If the input contains the exact phrase "Attachment '{{file_name}}' available at: {{attachment_url}}" (where '{{file_name}}' and '{{attachment_url}}' are placeholders for actual values), then you may use the 'download_file_from_url' tool if needed. Otherwise, you should use the 'tavily_search' tool.
-    for example: if task_id:cca530fc-7888-43b2-b130-b30968d8aa44, file_name:sample.jpg attachment URL will be https://agents-course-unit4-scoring.hf.space/files/cca530fc-7888-43b2-b130-b30968d8aa44 => invoke download_file_from_url(https://agents-course-unit4-scoring.hf.space/files/cca530fc-7888-43b2-b130-b30968d8aa44,sample.jpg)
+    NOTE: If the input contains the exact phrase "Attachment '{{file_name}}' available at: {{attachment_url}}" (where '{{file_name}}' and '{{attachment_url}}' are placeholders for actual values), then you may use the 'file_download_tool' if needed. Otherwise, you should use the 'tavily_search' tool.
+    For example: if task_id:cca530fc-7888-43b2-b130-b30968d8aa44, file_name:sample.jpg attachment URL will be https://agents-course-unit4-scoring.hf.space/files/cca530fc-7888-43b2-b130-b30968d8aa44.
+    Then, the Action and Action Input should be:
+    Action: file_download_tool
+    Action Input: {{"url": "https://agents-course-unit4-scoring.hf.space/files/cca530fc-7888-43b2-b130-b30968d8aa44", "local_filename": "sample.jpg"}}
 
 
     If you have sufficient information and can provide a CONCISE response, or if no tool is needed, you MUST use this precise format:
@@ -399,4 +401,4 @@ if __name__ == "__main__":
     print("-"*(60 + len(" App Starting ")) + "\n")
 
     print("Launching Gradio Interface for Basic Agent Evaluation...")
-    demo.launch(debug=True, share=False)
+    demo.launch(debug=True, share=False)