def METHOD_NAME():
    parser = argparse.ArgumentParser()
    parser.add_argument(
        "input_path", type=str, help="GCS location of C384 diagnostics data zarr."
    )
    parser.add_argument(
        "config_path", type=str, help="Location of diagnostics coarsening config yaml."
    )
    parser.add_argument(
        "--grid_spec",
        type=str,
        help=f"GCS location of C384 grid-spec. Defaults to {GRID_SPEC_C384}.",
        default=GRID_SPEC_C384,
    )
    parser.add_argument(
        "output_path",
        type=str,
        help="GCS location where coarsened diagnostics zarrs will be written. "
        "Specifically will be saved at {output_path}/{basename(input_path)}. "
        "Unexpected behavior may occur if this path already exists.",
    )
    return parser