This is the 'Host' template. It should be called in the following format:
{{Host
|name=
|location=
|purpose=
|os=
|disk=
|ram=
|swap=
|admin_toolkit=Yes/No
|ssh_root_keys=
|ssh_pam=
|ssh_userlogin=
|admins=
|ownership=
|mac=
}}
Edit the page to see the template text.