code: def render_description_meta_tag(context, is_og=False):
      
      request = context['request']
      content = ''
  
      # Try to get the description from the context object (e.g. DetailViews).
      if context.get('object'):
          try:
              content = context['object'].get_meta_description()
          except AttributeError:
              pass
      elif context.get('meta_tagger'):
          content = context['meta_tagger'].get('description')
  
      if not content:
          try:
              # Try for the meta description of the cms page.
              content = request.current_page.get_meta_description()
          except (AttributeError, NoReverseMatch):
              pass
  
      if content:
          return mark_safe('<meta {attr_name}="{tag_name}" content="{content}">'.format(
              attr_name='name' if not is_og else 'property',
              tag_name='description' if not is_og else 'og:description',
              content=content
          ))
      else:
          return ''
docs: Returns the description as meta or open graph tag.