def list_policies(Filter=None, NextToken=None, MaxResults=None):
    """
    Retrieves the list of all policies in an organization of a specified type.
    This operation can be called only from the organization's master account.
    See also: AWS API Documentation
    
    
    :example: response = client.list_policies(
        Filter='SERVICE_CONTROL_POLICY',
        NextToken='string',
        MaxResults=123
    )
    
    
    :type Filter: string
    :param Filter: [REQUIRED]
            Specifies the type of policy that you want to include in the response.
            

    :type NextToken: string
    :param NextToken: Use this parameter if you receive a NextToken response in a previous request that indicates that there is more output available. Set it to the value of the previous call's NextToken response to indicate where the output should continue from.

    :type MaxResults: integer
    :param MaxResults: (Optional) Use this to limit the number of results you want included in the response. If you do not include this parameter, it defaults to a value that is specific to the operation. If additional items exist beyond the maximum you specify, the NextToken response element is present and has a value (is not null). Include that value as the NextToken request parameter in the next call to the operation to get the next part of the results. Note that Organizations might return fewer results than the maximum even when there are more results available. You should check NextToken after every operation to ensure that you receive all of the results.

    :rtype: dict
    :return: {
        'Policies': [
            {
                'Id': 'string',
                'Arn': 'string',
                'Name': 'string',
                'Description': 'string',
                'Type': 'SERVICE_CONTROL_POLICY',
                'AwsManaged': True|False
            },
        ],
        'NextToken': 'string'
    }
    
    
    """
    pass
