Update app.py

app.py

@@ -113,16 +113,16 @@ def process_and_describe(payload: Dict[str, Any]) -> Dict[str, Any]:
     system_prompt = f"""
 Respond in STRICT JSON ONLY.
 Rules:
-1. Provide a short description of what you see.
+1. Provide a detail description of what you see.
 2. Decide ONE MCP tool to call from:
    - chat_with_human
-3. If a human is looking directly at the robot and waving, set "tool_name": "chat_with_human".
-4. Otherwise, set "tool_name": null and leave "arguments": {{}}
+3. If a human is gesturing with open hand, then set "tool_name": "chat_with_human".
+4. Otherwise, do not call tools.
 
 Output format:
 {{
  "description": "...",
- "tool_name": "chat_with_human | null",
+ "tool_name": "chat_with_human | ",
  "arguments": {{}}
 }}
 """