diff --git a/app/models/hyrax/permission_template.rb b/app/models/hyrax/permission_template.rb
index 6dbf84ec86..5e17dc2f2b 100644
--- a/app/models/hyrax/permission_template.rb
+++ b/app/models/hyrax/permission_template.rb
@@ -1,20 +1,45 @@
 # frozen_string_literal: true
 module Hyrax
   ##
-  # Defines behavior that is applied to objects added as members of an AdminSet
+  # Holds policy data about the workflow and permissions applied objects when
+  # they are deposited through an Administrative Set or a Collection. Each
+  # template record has a {#source} (through {#source_id}); the template's
+  # rules inform the behavior of objects deposited through that {#source_model}.
   #
-  #  * access rights to stamp on each object
-  #  * calculate embargo/lease release dates
+  # The {PermissionTemplate} specifies:
   #
-  # There is an interplay between an AdminSet and a PermissionTemplate.
+  # - an {#active_workflow} that the object will enter and be processed through.
+  # - {#access_grants} that can be applied to each object (especially at deposit
+  #   time).
+  # - an embargo configuration ({#release_date} {#release_period}) for default
+  #   embargo behavior.
   #
-  # @see Hyrax::AdminSet for further discussion
-  class PermissionTemplate < ActiveRecord::Base
+  # @todo write up what "default embargo behavior", when it is applied, and how
+  #   it interacts with embargoes specified by user input.
+  #
+  # @see Hyrax::AdministrativeSet
+  class PermissionTemplate < ActiveRecord::Base # rubocop:disable Metrics/ClassLength
     self.table_name = 'permission_templates'
 
+    ##
+    # @!attribute [rw] source_id
+    #   @return [String] identifier for the {Collection} or {AdministrativeSet}
+    #     to which this template applies.
+    # @!attribute [rw] access_grants
+    #   @return [Hyrax::PermissionTemplateAccess]
+    # @!attribute [rw] active_workflow
+    #   @return [Sipity::Workflow]
+    # @!attribute [rw] available_workflows
+    #   @return [Enumerable<Sipity::Workflow>]
     has_many :access_grants, class_name: 'Hyrax::PermissionTemplateAccess', dependent: :destroy
     accepts_nested_attributes_for :access_grants, reject_if: :all_blank
 
+    # The list of workflows that could be activated; It includes the active workflow
+    has_many :available_workflows, class_name: 'Sipity::Workflow', dependent: :destroy
+
+    # In a perfect world, there would be a join table that enforced uniqueness on the ID.
+    has_one :active_workflow, -> { where(active: true) }, class_name: 'Sipity::Workflow', foreign_key: :permission_template_id
+
     ##
     # @api public
     #
@@ -28,12 +53,6 @@ def agent_ids_for(agent_type:, access:)
       access_grants.where(agent_type: agent_type, access: access).pluck(:agent_id)
     end
 
-    # The list of workflows that could be activated; It includes the active workflow
-    has_many :available_workflows, class_name: 'Sipity::Workflow', dependent: :destroy
-
-    # In a perfect world, there would be a join table that enforced uniqueness on the ID.
-    has_one :active_workflow, -> { where(active: true) }, class_name: 'Sipity::Workflow', foreign_key: :permission_template_id
-
     ##
     # @note this is a convenience method for +Hyrax.query_service.find_by(id: template.source_id)+
     #
diff --git a/app/models/sipity.rb b/app/models/sipity.rb
index fec4974235..57bde2e35f 100644
--- a/app/models/sipity.rb
+++ b/app/models/sipity.rb
@@ -1,6 +1,12 @@
 # frozen_string_literal: true
 
+##
+# {Sipity} is a workflow/state engine.
 module Sipity
+  ##
+  # Cast a given input (e.g. a +::User+ or {Hyrax::Group} to a {Sipity::Agent}).
+  #
+  # @param input [Object]
   def Agent(input, &block) # rubocop:disable Naming/MethodName
     result = case input
              when Sipity::Agent
diff --git a/app/models/sipity/workflow.rb b/app/models/sipity/workflow.rb
index 03f5d11369..3ce5fdf3ed 100755
--- a/app/models/sipity/workflow.rb
+++ b/app/models/sipity/workflow.rb
@@ -1,5 +1,6 @@
 # frozen_string_literal: true
 module Sipity
+  ##
   # A named workflow for processing an entity. Originally I had thought of
   # calling this a Type, but once I extracted the Processing submodule,
   # type felt to much of a noun, not conveying potentiality. Workflow
diff --git a/spec/indexers/hyrax/valkyrie_administrative_set_indexer_spec.rb b/spec/indexers/hyrax/valkyrie_administrative_set_indexer_spec.rb
new file mode 100644
index 0000000000..3d8c2cb9ef
--- /dev/null
+++ b/spec/indexers/hyrax/valkyrie_administrative_set_indexer_spec.rb
@@ -0,0 +1,21 @@
+# frozen_string_literal: true
+
+require 'hyrax/specs/shared_specs'
+
+RSpec.describe Hyrax::AdministrativeSetIndexer do
+  subject(:service) { described_class.new(resource: admin_set) }
+  let(:admin_set) { FactoryBot.valkyrie_create(:hyrax_admin_set, title: [admin_set_title]) }
+  let(:admin_set_title) { 'An Admin Set' }
+
+  it 'is resolved from an admin set' do
+    expect(Hyrax::ValkyrieIndexer.for(resource: admin_set))
+      .to be_a described_class
+  end
+
+  describe '#to_solr' do
+    it 'includes default attributes ' do
+      expect(subject.to_solr)
+        .to include 'generic_type_si' => 'Admin Set', 'title_tesim' => [admin_set_title]
+    end
+  end
+end