def METHOD_NAME(namespace_name: Optional[pulumi.Input[str]] = None,
                    resource_group_name: Optional[pulumi.Input[str]] = None,
                    rule_name: Optional[pulumi.Input[str]] = None,
                    subscription_name: Optional[pulumi.Input[str]] = None,
                    topic_name: Optional[pulumi.Input[str]] = None,
                    opts: Optional[pulumi.InvokeOptions] = None) -> pulumi.Output[GetRuleResult]:
    """
    Retrieves the description for the specified rule.
    :param str namespace_name: The namespace name
    :param str resource_group_name: Name of the Resource group within the Azure subscription.
    :param str rule_name: The rule name.
    :param str subscription_name: The subscription name.
    :param str topic_name: The topic name.
    """
    ...