I have been quite active in the Amazon Alexa Skills Kit forum as of late and it appears that there have been issues with the Alexa service returning all the usual properties in the JSON response. For example 1 of those properties that vanished is deviceId.
alexa skills kit
Back in April Amazon added the concept of permissions into the Amazon Skill world when they introduced the Device Location API.
Today via a blog post, Amazon have announced the preview of the new Alexa Skills Kit. Although the preview is currently only available for US skills the new kit demonstrates that we are working on a maturing system. Much of the functionality within the new skills kit could be created by the skills developer, however, the advantage of using built-in intents can be seen when trying to cater for a large number of sample utterances to cover each potential method an end-user may use to request information.