Query tag from site in blueprint

Hello!
I have troubles query from the tag on the site blueprint in another page. It works for php but not in yml.
Here is the tag on the site.yml:

  - width: 1/2
sections:
  notes: sections/projects
  pages: sections/pages
  offices: sections/offices
  # The `notes` section reuses the pages section defined in `/site/blueprints/sections/notes.yml`
  meta:
    type: fields
    fields:
      tags:
        label: Tags
        type: tags

And here I tried to implement it:

categories:
        label: Categories
        type: multiselect
        min: 1
        max: 4
        options: query
        query: site.tags

or here:

categories:
        label: Categories
        type: multiselect
        min: 1
        max: 4
        options: query
        query: site.index.pluck("tags", ",", true)

both are not working. The secound gives the tags of the subpages…
I think there must be a simple solution. Thanks ahead!

Must be site.tags.split, see the docs: Multiselect | Kirby CMS

Thank you!! :slight_smile: