Neptune describe_db_instances returns RDS instances

[CloudSecuritySmith]

Using Python 3.7 and boto3 v1.9.71

When using the describe_db_instances with a Neptune client, it returns RDS instances instead of only Neptune instances.

Seems like this is unintentional since the GUI only shows instances related to the service.

Was using the below code to surface usage of the service in our enterprise:

def has_neptune_use(session: boto3.Session) -> bool:
    regions = session.get_available_regions('neptune')
    for r in regions:
        client = session.client('neptune', region_name=r)
        response = client.describe_db_instances()
        try:
            if response['DBInstances']:
                print(response['DBInstances'])
                return True
        except KeyError:
            continue
    return False

[JordonPhillips]

Since this is coming from the service directly there's nothing we can do - I would recommend contacting the service team via their forum or support.