Showing tag description in link preview instead of "Topics tagged: tag_name"

When I link the main page of a tag Topics tagged automation . The link preview reads “Topics tagged tag_name”. Is it possible to customize this text, possibly including the tag description?

I managed to change the text by changing the rss_by_tag entry from the Text customization setting. However, it doesn’t show the tag description when I type %{tag.description}. Is there a way to resolve this?

Anyone has an idea on this? Especially for accessing the tag description.