Update app.py

app.py

@@ -15,8 +15,6 @@ ROBOT_ID = "Robot_MCP_Client"
 HF_TOKEN = os.environ.get("HF_TOKEN")
 if not HF_TOKEN:
     print("Warning: HF_TOKEN not found. API calls may fail.")
-    # Set a placeholder string to avoid the 'None is not of type string' error
-    # The API call will fail later due to auth, but validation will pass.
     HF_TOKEN = "missing_token_placeholder" 
 
 # The MCP URL of your remote server
@@ -35,16 +33,13 @@ async def process_webcam_stream_async(image):
     if image is None:
         return "", "", "", ""
 
-    # Check if a valid token is available before proceeding
     if HF_TOKEN == "missing_token_placeholder":
         return "Error: HF_TOKEN not set locally.", "", "", ""
 
-    # Convert Image to base64
     buffered = io.BytesIO()
     image.save(buffered, format="JPEG")
     b64_img = base64.b64encode(buffered.getvalue()).decode("utf-8")
 
-    # Prepare payload
     payload = {
         "hf_token_input": HF_TOKEN,
         "robot_id_input": ROBOT_ID,
@@ -56,11 +51,14 @@ async def process_webcam_stream_async(image):
             response = await MCP_CLIENT.call_tool(TOOL_NAME, payload)
             
             if response.is_error:
-                error_text = response.content.text if response.content else "Unknown error"
+                # Access the first item in the content list for the error text
+                error_text = response.content[0].text if response.content and isinstance(response.content, list) else "Unknown error"
                 raise Exception(f"MCP Tool Error: {error_text}")
 
             import json
-            response_dict = json.loads(response.content.text)
+            # Access the first item in the content list for the raw JSON string
+            raw_text = response.content[0].text
+            response_dict = json.loads(raw_text)
             
             vlm_result = response_dict.get("result", {})