command `openstack project list ` does not work without scope

With only

export OS_AUTH_URL=http://phx2.cloud.rdoproject.org:35357/
export OS_USERNAME=ayoung
export OS_PASSWORD=9aab6c59-ff0f-46f6-bb1a-f73b7a40b5a7
export OS_USER_DOMAIN_NAME=Default

I can get an unscoped token. With the same set of values, I should be able to get a list of projects, so I know what tokens I can use. This is how django-openstack-auth work:

http://git.openstack.org/cgit/openstack/django_openstack_auth/tree/openstack_auth/utils.py#n357

def get_project_list(*args, **kwargs):
    is_federated = kwargs.get('is_federated', False)
    sess = kwargs.get('session') or get_session()
    auth_url, _ = fix_auth_url_version_prefix(kwargs['auth_url'])
    auth = token_endpoint.Token(auth_url, kwargs['token'])
    client = get_keystone_client().Client(session=sess, auth=auth)

    if get_keystone_version() < 3:
        projects = client.tenants.list()
    elif is_federated:
        projects = client.federation.projects.list()
    else:
        projects = client.projects.list(user=kwargs.get('user_id'))

    projects.sort(key=lambda project: project.name.lower())
    return projects