'properties' parameter in google.cloud.bigquery.client.Client.update_table is not documented. The body of the description is also inaccurate as it always does a PATCH request. See: https://googlecloudplatform.github.io/google-cloud-python/latest/bigquery/reference.html#google.cloud.bigquery.client.Client.update_table