The readable description you see in the UI for the attribute.
options
Array of strings
To create list attributes. Provide a set of hashes with value as the key of the options you want to make. data_type must be string.
messenger_writable
boolean
Can this attribute be updated by the Messenger
{"name": "My Data Attribute","model": "contact","data_type": "string","description": "My Data Attribute Description","options": ["option1","option2"],"messenger_writable": false}