lib/meta_manager/helper.rb
def render_meta_tag_content(meta_tag)
        method_name = "render_meta_tag_content_#{meta_tag.name}".to_sym
        send(method_name, meta_tag) if respond_to?(method_name, true)

        meta_tag.get_content(self)
      end
def render_meta_tag_content(meta_tag)
        method_name = "render_meta_tag_content_#{meta_tag.name}".to_sym
        send(method_name, meta_tag) if respond_to?(method_name, true)

        meta_tag.get_content(self)
      end
Call render_meta_tag_content_description if method exists
 Controller:
  protected

   def render_meta_tag_content_description(meta_tag)
      if !params[:page].blank? && params[:page] != '1'
        meta_tag.content += " - page #{params[:page].to_i}"
      end
   end