EventBridgeScheduler.Client.tag_resource(**kwargs): Cannot get it to work

[paulushub]

EventBridgeScheduler.Client.tag_resource(**kwargs)

Does this work? If so, how is this displayed in the console? I could not find any indication of tag support.
Also, trying the following only gives error:

def lambda_handler():
    input_data: Dict[str, Any] = {
        "test2": "value2",
        "test3": "value3",
    }

    response = scheduler.create_schedule(
        ActionAfterCompletion="DELETE",
        FlexibleTimeWindow={"Mode": "OFF"},
        ScheduleExpression='at(2023-12-11T22:20:00)',
        ScheduleExpressionTimezone="UTC+09:00",
        Target={
            "Arn": target_arn,
            "Input": json.dumps(input_data),
            "RoleArn": "arn:aws:iam::...",
        },
        Name=str(uuid.uuid4()),
    )
    if response["ResponseMetadata"]["HTTPStatusCode"] != 200:
        return

    ScheduleArn: str = response["ScheduleArn"]
    print(f"ScheduleArn={ScheduleArn}")
    tag_response = scheduler.tag_resource(
        ResourceArn=ScheduleArn,
        Tags=[
            {"Key": "Scheduled", "Value": "Value1"},
            {"Key": "Source", "Value": "Value2"},
        ],
    )

Error message

The event is created, but the tagging fails.

botocore.errorfactory.ValidationException: An error occurred (ValidationException) when calling the TagResource operation: 1 validation error detected: Value 'arn:aws:scheduler:XXXX:schedule/default/cccc-269591437146362' at 'resourceArn' failed to satisfy constraint: Member must satisfy regular expression pattern: arn:aws(-[a-z]+)?:scheduler:[a-z0-9\-]+:\d{12}:schedule-group\/[0-9a-zA-Z-_.]+
{'Error': {'Code': 'ValidationException',
           'Message': '1 validation error detected: Value '
                      "'arn:aws:scheduler:XXXX:schedule/default/cccc-269591437146362' "
                      "at 'resourceArn' failed to satisfy constraint: Member "
                      'must satisfy regular expression pattern: '
                      'arn:aws(-[a-z]+)?:scheduler:[a-z0-9\\-]+:\\d{12}:schedule-group\\/[0-9a-zA-Z-_.]+'},
 'Message': '1 validation error detected: Value '
            "'arn:aws:scheduler:XXXX:schedule/default/cccc-269591437146362' "
            "at 'resourceArn' failed to satisfy constraint: Member must "
            'satisfy regular expression pattern: '
            'arn:aws(-[a-z]+)?:scheduler:[a-z0-9\\-]+:\\d{12}:schedule-group\\/[0-9a-zA-Z-_.]+',