def get_all_clouds(session, return_type=None, **kwargs):
    """
    Retrieves details for all clouds on the Cloud.

    :type session: zadarapy.session.Session
    :param session: A valid zadarapy.session.Session object.  Required.

    :type return_type: str
    :param return_type: If this is set to the string 'json', this function
        will return a JSON string.  Otherwise, it will return a Python
        dictionary.  Optional (will return a Python dictionary by default).

    :rtype: dict, str
    :returns: A dictionary or JSON data set as a string depending on
        return_type parameter.
    """
    path = '/api/clouds.json'
    return session.get_api(path=path, return_type=return_type, **kwargs)
