diff --git a/src/CheckAgentServices.php b/src/CheckAgentServices.php
index 170d51e52891cbb3b18d230217e02d8521e3874e..1230a874f1fe90726b467cb9bea3e0a9aa331c93 100644
--- a/src/CheckAgentServices.php
+++ b/src/CheckAgentServices.php
@@ -5,7 +5,7 @@ namespace Drupal\user_agent_class;
 use Drupal\Core\Entity\EntityTypeManagerInterface;
 
 /**
- * Class CheckAgentServices.
+ * Service for checking user agents.
  */
 class CheckAgentServices implements CheckAgentServicesInterface {
 
diff --git a/src/CheckAgentServicesInterface.php b/src/CheckAgentServicesInterface.php
index 7552e03b4a778276fb6e102654a42792a6ae7137..9263a0c2dc2e369aa8094b357af6ce100aad1aaa 100644
--- a/src/CheckAgentServicesInterface.php
+++ b/src/CheckAgentServicesInterface.php
@@ -3,7 +3,7 @@
 namespace Drupal\user_agent_class;
 
 /**
- * Interface CheckAgentServicesInterface.
+ * Interface for checking user agents.
  */
 interface CheckAgentServicesInterface {
 
diff --git a/src/Controller/CheckUserAgentController.php b/src/Controller/CheckUserAgentController.php
index 52d5efcd0584b40834ee67381e95b4ea4d2d081f..44b08007afa0b4889496977cdad25242213a0aac 100644
--- a/src/Controller/CheckUserAgentController.php
+++ b/src/Controller/CheckUserAgentController.php
@@ -2,12 +2,12 @@
 
 namespace Drupal\user_agent_class\Controller;
 
+use Drupal\Component\Utility\Xss;
 use Drupal\Core\Controller\ControllerBase;
 use Symfony\Component\HttpFoundation\Request;
-use Drupal\Component\Utility\Xss;
 
 /**
- * Class CheckUserAgentController.
+ * Controller for checking and displaying the current user agent string.
  */
 class CheckUserAgentController extends ControllerBase {
 
diff --git a/src/EventSubscriber/UserAgentSubscriber.php b/src/EventSubscriber/UserAgentSubscriber.php
index 6f09a68aca8dd9100e64cbf5a9ff5acf513aba18..f2c0b88dee12e581705a82ff7166b7de7a361d4e 100644
--- a/src/EventSubscriber/UserAgentSubscriber.php
+++ b/src/EventSubscriber/UserAgentSubscriber.php
@@ -2,15 +2,15 @@
 
 namespace Drupal\user_agent_class\EventSubscriber;
 
-use Symfony\Component\HttpKernel\KernelEvents;
-use Symfony\Component\EventDispatcher\EventSubscriberInterface;
-use Symfony\Component\HttpKernel\Event\RequestEvent;
 use Drupal\Component\Utility\Xss;
-use Drupal\user_agent_class\CheckAgentServices;
 use Drupal\Core\Config\ConfigFactory;
+use Drupal\user_agent_class\CheckAgentServices;
+use Symfony\Component\EventDispatcher\EventSubscriberInterface;
+use Symfony\Component\HttpKernel\Event\RequestEvent;
+use Symfony\Component\HttpKernel\KernelEvents;
 
 /**
- * Class UserAgentSubscriber.
+ * Subscriber to tracks user agent class based on request headers.
  */
 class UserAgentSubscriber implements EventSubscriberInterface {
 
diff --git a/src/Form/DeviceEntityForm.php b/src/Form/DeviceEntityForm.php
index 4278b2b03561239099bc1a1e0b3e2bfdb2e225ba..5157c12dd7fd29c8d62a31ea64ceb24ac2460a4d 100644
--- a/src/Form/DeviceEntityForm.php
+++ b/src/Form/DeviceEntityForm.php
@@ -6,7 +6,7 @@ use Drupal\Core\Entity\EntityForm;
 use Drupal\Core\Form\FormStateInterface;
 
 /**
- * Class DeviceEntityForm.
+ * Defines the DeviceEntityForm class for configuring device entities.
  */
 class DeviceEntityForm extends EntityForm {
 
diff --git a/src/Form/ProvideForm.php b/src/Form/ProvideForm.php
index 40ab700fb0451df63757f1678535c7cc5b3d7806..1e9e2cf64ce9209663fc74e2e44324b6f242926d 100644
--- a/src/Form/ProvideForm.php
+++ b/src/Form/ProvideForm.php
@@ -6,7 +6,7 @@ use Drupal\Core\Form\ConfigFormBase;
 use Drupal\Core\Form\FormStateInterface;
 
 /**
- * Class ProvideForm.
+ * Implements a form for configuring user agent retrieval responsibility.
  */
 class ProvideForm extends ConfigFormBase {
 
diff --git a/src/Form/UserAgentEntityForm.php b/src/Form/UserAgentEntityForm.php
index cc47f110293c2616fed02ae16d49fc07dd80b926..3bd0cb1ce78263e0b5c6a69f700cb79759b8e399 100644
--- a/src/Form/UserAgentEntityForm.php
+++ b/src/Form/UserAgentEntityForm.php
@@ -6,7 +6,7 @@ use Drupal\Core\Entity\EntityForm;
 use Drupal\Core\Form\FormStateInterface;
 
 /**
- * Class UserAgentEntityForm.
+ * Defines the UserAgentEntityForm class for configuring user agent entities.
  */
 class UserAgentEntityForm extends EntityForm {