You can also get a preview of the output of a command by calling the command with the --generate-cli-skeleton output option. This can speed up the process of combining CLI commands as you can see a response without actually calling the API:
$ aws ec2 describe-availability-zones --generate-cli-skeleton output { "AvailabilityZones": [ { "ZoneName": "ZoneName", "State": "State", "RegionName": "RegionName", "Messages": [ { "Message": "Message" } ] } ] }