def list_key_policies(KeyId=None, Limit=None, Marker=None):
    """
    Retrieves a list of policies attached to a key.
    See also: AWS API Documentation
    
    Examples
    The following example lists key policies for the specified CMK.
    Expected Output:
    
    :example: response = client.list_key_policies(
        KeyId='string',
        Limit=123,
        Marker='string'
    )
    
    
    :type KeyId: string
    :param KeyId: [REQUIRED]
            A unique identifier for the customer master key (CMK). You can use the unique key ID or the Amazon Resource Name (ARN) of the CMK. Examples:
            Unique key ID: 1234abcd-12ab-34cd-56ef-1234567890ab
            Key ARN: arn:aws:kms:us-east-2:111122223333:key/1234abcd-12ab-34cd-56ef-1234567890ab
            

    :type Limit: integer
    :param Limit: Use this parameter to specify the maximum number of items to return. When this value is present, AWS KMS does not return more than the specified number of items, but it might return fewer.
            This value is optional. If you include a value, it must be between 1 and 1000, inclusive. If you do not include a value, it defaults to 100.
            Currently only 1 policy can be attached to a key.
            

    :type Marker: string
    :param Marker: Use this parameter in a subsequent request after you receive a response with truncated results. Set it to the value of NextMarker from the truncated response you just received.

    :rtype: dict
    :return: {
        'PolicyNames': [
            'string',
        ],
        'NextMarker': 'string',
        'Truncated': True|False
    }
    
    
    :returns: 
    (string) --
    
    """
    pass
