Update tools/FinalAnswerTool.py

tools/FinalAnswerTool.py

@@ -19,7 +19,8 @@ You MUST follow this order of preference for information gathering:
 1. ALWAYS use SerpApiSearchTool first for factual data.
 2. If more detail is needed, THEN use Wikipedia tools (wiki_titles → wiki_page).
 3. Use Python tools or math tools for calculations.
-4. You MUST ALWAYS call final_answer AS THE LAST TOOL CALL.
+4. Use calculator for probability questions.
+5. You MUST ALWAYS call Final Answer tool AS THE LAST TOOL CALL.
 
 You may NOT return a final answer directly in text. The final answer
 MUST come through the final_answer tool.