opsman_domain_or_ip_address:
opsman_admin_username:
opsman_admin_password:
pivnet_token:
iaas:

opsman_domain_or_ip_address:        # FQDN to access Ops Manager without protocol (will use https), ex: opsmgr.example.com
opsman_admin_username:              # Username for Ops Manager admin account
opsman_admin_password:              # Password for Ops Manager admin account
pivnet_token:             # Pivnet token for downloading resources from Pivnet. Find this token at https://network.pivotal.io/users/dashboard/edit-profile

# The IaaS name for which stemcell to download. This must match the IaaS name
# within the stemcell to download, e.g. "vsphere", "aws", "azure", "google" must be lowercase. 

iaas:

Add param descriptions for clarity
Add param descriptions for clarity