Tags in Permalinks

Do you mean in the default permalink Blot generates for a post without Link or Permalink metadata set?

If so, it's not possible but I'd be willing to make it possible by extending the available tokens for a custom URL format.

Could you give me a few examples of URLs you'd like to be able to create?

I mean, editing the link format for a post (/settings/services/permalinks)

I'd love to be able to create a structure like: /{{tag-slug}}/{{post-slug}} or /{{tag-slug}}-{{post-slug}}