Update app.py

fixed image caption prompt

app.py

@@ -29,7 +29,7 @@ visit_webpage_tool = VisitWebpageTool()
 final_answer = FinalAnswerTool()
 
 model = LiteLLMModel(
-    model_id="gemini/gemini-2.0-flash",
+    model_id="gemini/gemini-2.0-flash-lite",
     temperature=0.2,
     api_key=os.environ.get("GEMINI_KEY")
 )
@@ -56,7 +56,7 @@ class ImageDescriptionTool(Tool):
         try:
             image_file = self.client.files.upload(file=f"{file_name}")
             image_description = self.client.models.generate_content(
-                model="gemini-2.0-flash", contents=["Describe this audio clip", image_file]
+                model="gemini-2.0-flash", contents=["Describe this image file", image_file]
             )
             return image_description.text
         except Exception as e: