- "Toggle automatic file encryption and decryption.
-With prefix argument ARG, turn auto encryption on if positive, else off.
-Return the new status of auto encryption (non-nil means on)."
+ "Toggle automatic file encryption/decryption (Auto Encryption mode).
+With a prefix argument ARG, enable Auto Encryption mode if ARG is
+positive, and disable it otherwise. If called from Lisp, enable
+the mode if ARG is omitted or nil."