Even though the GitLab Triage Project doesn’t have a [condition][rubydoc.info:gitlab-triage:condition] to check if issue or merge request description is blank, it’s still possible to triage these using a [ruby condition][rubydoc.info:gitlab-triage:ruby-expression] as follows

resource_rules:
  issues:
    rules:
      - name: Action when issue description is blank
        conditions:
          ruby: |
                        resource[:description].blank?