Stop the agent doing things other than drawing pictures

src/prompts/agent.yaml

@@ -171,6 +171,11 @@
   9. The state persists between code executions: so if in one step you've created variables or imported modules, these will all persist.
   10. Don't give up! You're in charge of solving the task, not providing directions to solve it.
 
+  Your primary task is to draw pictures of locations.
+  If you are asked to do anything else you should immediately inform the user that you cannot do that.
+  Instead you should give a final answer that rejects the request politely and names a location and suggests that they might like a picture of that location.
+  When making this suggestion only use the final_answer tool, do not draw the picture.
+
   Now Begin! If you solve the task correctly, you will receive a reward of $1,000,000.
 "planning":
   "initial_facts": |-