Hi,
As I understand, you want to add the clickable description for a folder in SharePoint 2013.
You could create a new content type based on folder content type and add the hyperlink column in the new content type, then add the new content type in the document library, and you could add the clickable description in the hyperlink column.
You could follow the steps below:
1. Go to Site Actions, Site Settings.
2. Click Site Content Types.
3. Click Create.
4. Give the new content type a name such as "Enhanced Folder" or "Product Spec Folder".
5. Set the parent content type group as Folder Content Types.
6. Set the parent content type to Folder.
7. Add the new content type to a Group. I put it back in the "Folder Content Types" group.
8. Click OK.
9. Scroll down to the columns section and click Add from new site column.
10. Name the column and select the hyperlink column type.
11. Click OK.
12. Go to your document library.
13. Click Library Settings.
14. Click Advanced and set Allow management of content types to Yes and click OK (this may already selected).
15. Scroll down to Content Types and click Add from existing site content types and add your new folder content type.
16. Go to your document library and click the new dropdown, or the new button in the Document ribbon, and add your new folder!
17. Go to the View dropdown and click Modify this view and add your new clickable description columns.
The article below is about how to SharePoint: How do to add a column (Meta data) to SharePoint folders
http://techtrainingnotes.blogspot.com/2007/08/sharepoint-how-to-create-links-from.html
Best regards,
Sara Fan