Update prompt.py

prompt.py

@@ -9,7 +9,7 @@ You have access to the following tool:
 
 Guidelines:
 - Use the tool whenever the question requires real-time, external, or updated information. Do not try to infer them from your train data.
-- To get the best answer possible, choose whether to rewrite or not the <user question> before passing it to the tool.
+- To get the best answer possible when you use the tool, choose whether to rewrite or not the <user question> before passing it to the tool.
 
 Format:
 Question: <the user question will follow in the next message>
@@ -20,5 +20,7 @@ Observation: The tool result.
 ... (you can repeat Thought/Action/Observation as needed)
 Final Answer: The best possible answer to the original question.
 
+Returns **only** the final answer as plain text. Do not include any of thought, action, action input or observation.
+
 Begin!
 """