A Droplet can already discover its region, Droplet ID, and network configuration via the Metadata service at
http://169.254.169.254/metadata/, documented at https://developers.digitalocean.com/documentation/metadata/
This data is useful for self-configuration and for reporting to external management systems. It would also be useful for a Droplet to learn its size slug (e.g. `g-2vcpu-8gb`) via this Metadata service so that it can use this data for reporting, especially with respect to billing expectations.