Since this is library is not specific to PE, the description shouldn't only be about PE.  Perhaps something like

action.option '--insecure' do
  summary 'Don\'t perform ENC SSL certificate verification'
  description <<-'EOT'
    Don't verify the SSL certificate when connecting to an ENC.
    When connecting to the Puppet Enterprise Console, verification usually 
    can be skipped since verification would fail due to PE Console's SSL 
    certificate being self signed by default.
  EOT
  default_to { false }
end