TODO(sll) in core/domain/customization_args_util.py: TODO(sll): Raising Exceptions if parameters are not involved.

[cj-nwuju]

Throw a specific exception if parameters are absent. If present, provide sample values for state context parameters. This should ensure robust error handling and aid in debugging by clarifying parameter requirements.

[seanlip]

Closing because this doesn't follow expected issue-filing conventions.