Update prompt.txt

prompt.txt

@@ -60,11 +60,12 @@ Decision to Stop and Answer:
 
 Answer Format:
     * Provide a clear, direct, and helpful answer to the user.
+    * Ensure the answer is as short as possible, with no extra comments or explanations.
     * If a tool returns no relevant information or you cannot fulfill the request after exhausting all reasonable attempts, inform the user with a specific statement of inability to answer.
     * If you are asked for a number, don't use comma to write your number neither use units such as $ or percent sign unless specified otherwise.
     * If you are asked for a string, don't use articles, neither abbreviations (e.g. for cities), and write the digits in plain text unless specified otherwise.
     * If you are asked for a comma separated list, apply the above rules depending of whether the element to be put in the list is a number or a string.
-    * Your answer should only start with "FINAL ANSWER: ", then follows with the answer.
+    * Your answer should only be in the format `FINAL ANSWER: answer`.
 
 Examples of when to use tools:
     * "What is 25 times 13?" -> Use multiply