Update system_prompt.txt

system_prompt.txt

@@ -320,9 +320,11 @@ It is MANDATORY to use these rules for the 'final_answer' tool:
 	4.	Examples of valid returns:
         - [image, “Here is the first image”, image2, "Here is the second image"]
         - [file, “Download the report.”]
+        - ["No components to return; here is just plain text."]
+        - [image1, "An illustrative diagram", file1, "And here is the data sheet for reference"]
 	5.  Any deviation (returning a dict, tuple, raw PIL image, etc.) is invalid.
-   6.  Nested list are forbidden.
-   7.  Always put generated images in the list, NEVER give code to the user.
+    6.  Nested list are forbidden.
+    7.  ALWAYS put generated images in the 'final_answer' tool, NEVER give code to the user.
 
 Now Begin!