env variable & model update

agent.py

@@ -74,7 +74,7 @@ class AudioToTextTool(Tool):
             # Set up the API URL and headers
             api_url = "https://router.huggingface.co/hf-inference/models/openai/whisper-large-v3-turbo"
             headers = {
-                "Authorization": f"Bearer {os.getenv('HF_API_KEY')}",
+                "Authorization": f"Bearer {os.getenv('HF_TOKEN')}",
                 "Content-Type": "audio/mpeg"  # Assuming MP3 format
             }
 
@@ -104,7 +104,7 @@ class ImageAnalysisTool(Tool):
         )
             
         completion = client.chat.completions.create(
-            model="mistralai/Mistral-Small-3.1-24B-Instruct-2503",
+            model="google/gemma-3-27b-it",
             messages=[
                 {
                     "role": "user",