def METHOD_NAME(api_id: Optional[str] = None,
                            resource_group_name: Optional[str] = None,
                            service_name: Optional[str] = None,
                            tag_description_id: Optional[str] = None,
                            opts: Optional[pulumi.InvokeOptions] = None) -> AwaitableGetApiTagDescriptionResult:
    """
    Get Tag description in scope of API
    Azure REST API version: 2022-08-01.
    :param str api_id: API revision identifier. Must be unique in the current API Management service instance. Non-current revision has ;rev=n as a suffix where n is the revision number.
    :param str resource_group_name: The name of the resource group. The name is case insensitive.
    :param str service_name: The name of the API Management service.
    :param str tag_description_id: Tag description identifier. Used when creating tagDescription for API/Tag association. Based on API and Tag names.
    """
    __args__ = dict()
    __args__['apiId'] = api_id
    __args__['resourceGroupName'] = resource_group_name
    __args__['serviceName'] = service_name
    __args__['tagDescriptionId'] = tag_description_id
    opts = pulumi.InvokeOptions.merge(_utilities.get_invoke_opts_defaults(), opts)
    __ret__ = pulumi.runtime.invoke('azure-native:apimanagement:getApiTagDescription', __args__, opts=opts, typ=GetApiTagDescriptionResult).value
    return AwaitableGetApiTagDescriptionResult(
        description=pulumi.get(__ret__, 'description'),
        display_name=pulumi.get(__ret__, 'display_name'),
        external_docs_description=pulumi.get(__ret__, 'external_docs_description'),
        external_docs_url=pulumi.get(__ret__, 'external_docs_url'),
        id=pulumi.get(__ret__, 'id'),
        name=pulumi.get(__ret__, 'name'),
        tag_id=pulumi.get(__ret__, 'tag_id'),
        type=pulumi.get(__ret__, 'type'))