Then I think it's not DRY. What about:
```ruby
module Actions
  module Candlepin
    module Consumer
      class Create < Candlepin::Action
        ATTRIBUTES = [:cp_environment_id, :organization_label, :name,
                      :cp_type, :facts, :installed_products, :autoheal,
                      :release_ver, :service_level, :capabilities]

        input_format do
          ATTRIBUTES.each do |attr|
            param attr
          end
        end

        def run
          output[:response] = ::Katello::Resources::Candlepin::Consumer.
              create(*input.update(:uuid => '').values_at(*ATTRIBUTES))
        end
      end
    end
  end
end
```