def get_policy_rule_name(rule_type: str) -> str:
    """
    Get policy rule API name convention.
    Args:
        rule_type (str): Command rule type name convention.

    Returns:
        str: Azure collection API name convention.

    """
    rule_types = {
        "network_rule": "NetworkRule",
        "application_rule": "ApplicationRule",
        "nat_rule": "NatRule"
    }

    return rule_types.get(rule_type, "")