Update app.py

app.py

@@ -206,16 +206,17 @@ When you have the answer:
 ANSWER: <value>
 
 CRITICAL RULES:
-1. NEVER guess - only answer when you have verified the information from a source
-2. For reversed/encoded text questions - use PYTHON to decode immediately
-3. For file questions - the file content is provided above, analyze it with PYTHON
-4. For math/counting - use PYTHON to compute
-5. Answer format must be EXACT:
+1. NEVER answer on your first response - ALWAYS use a tool first to verify
+2. NEVER guess or use training knowledge - only state facts proven by tool results
+3. For reversed/encoded text questions - use PYTHON to decode immediately
+4. For file questions - the file content is provided above, analyze it with PYTHON
+5. For math/counting - use PYTHON to compute
+6. Answer format must be EXACT:
    - Numbers: digits only, no units unless explicitly asked
    - Lists: comma separated, alphabetical if asked, exact spelling
    - Names: exact as found in source
-6. If you see a URL in the question - FETCH it first
-7. Do NOT make up data - search for it"""
+7. If you see a URL in the question - FETCH it first
+8. Do NOT make up data - search for it"""
 
         history = []
         initial_prompt = f"{system}\n\nQuestion: {question}{file_context}"
@@ -246,7 +247,8 @@ CRITICAL RULES:
             if not python_match:
                 python_match = re.search(r'```\n(.*?)```', response, re.DOTALL)
 
-            if answer_match:
+            # Block ANSWER on iteration 0 - force at least one real tool call first
+            if answer_match and (iteration > 0 or file_content):
                 answer = answer_match.group(1).strip()
                 print(f"  Final Answer: {answer}")
                 return answer