Update tools.py

tools.py

@@ -1,7 +1,9 @@
 import base64
 from langchain_core.messages import AnyMessage, HumanMessage, AIMessage
+from langchain.tools import tool
 
 
+@tool
 def extract_text(img_path: str) -> str:
     """
     Extract text from an image file using a multimodal model.
@@ -54,6 +56,7 @@ def extract_text(img_path: str) -> str:
         return ""
 
 
+@tool
 def describe_image(img_path: str, query: str) -> str:
     """
     Generate a detailed description of an image using a multimodal model.