Update tools.py

tools.py

@@ -4,6 +4,9 @@ from huggingface_hub import list_models
 import pandas as pd
 import numpy as np
 from typing import TypedDict, Annotated, Union, Dict, Any
+import base64
+from langchain_core.messages import HumanMessage
+from langchain_openai import ChatOpenAI
 
 def get_hub_stats(author: str) -> str:
     """Fetches the most downloaded model from a specific author on the Hugging Face Hub."""