<tool name="test_code_evaluator_draft">
  <description>Run the current code-evaluator draft in the mounted form preview path and return the preview result to PXI.</description>
  <when_to_use>
    - After reading the draft and the user asks for or agrees to a preview test.
    - When you need execution feedback before deciding whether to revise the evaluator or test payload again.
  </when_to_use>
  <preflight>
    - Call `read_code_evaluator_draft` first if you want to confirm the current draft before testing.
  </preflight>
  <guidelines>
    - Treat preview failures as iteration signals: inspect the error/result, revise the source or `testPayload`, and test again.
    - This tool does not create or update an evaluator. The user must still click Create or Update from the form when they are satisfied.
  </guidelines>
</tool>
