-Note that for safety the :command:`show result` executes within the context of
-a command handler with only Python's :code:`__builtins__`, the :code:`mudpy`
-library package, and the active :code:`universe` available.
+Note that for safety the :command:`evaluate` executes within the context of
+a command handler with limited Python :code:`__builtins__`, the
+:code:`mudpy` library package, and the active :code:`universe` available,
+and also blocks evaluation of any statement containing double-underscores
+(:code:`__`) as well as :code:`lambda` functions. For admins to gain access
+to unsafe debugging commands, the ``.mudpy.limit.debug`` option must be
+enabled in configuration first and the service reloaded or restarted. It
+should still be considered unsafe, since the engine's file handling
+functions could easily alter accessible files or expressions like
+``9**9**9`` could be used to hang the service for indeterminate periods.