diff --git a/core/modules/filter/lib/Drupal/filter/Plugin/Filter/FilterAutoP.php b/core/modules/filter/lib/Drupal/filter/Plugin/Filter/FilterAutoP.php
index 2b12aaf..62d3649 100644
--- a/core/modules/filter/lib/Drupal/filter/Plugin/Filter/FilterAutoP.php
+++ b/core/modules/filter/lib/Drupal/filter/Plugin/Filter/FilterAutoP.php
@@ -12,7 +12,7 @@
 use Drupal\filter\Plugin\FilterBase;
 
 /**
- * @todo.
+ * Provides a filter to conver line breaks to HTML.
  *
  * @Filter(
  *   id = "filter_autop",
diff --git a/core/modules/filter/lib/Drupal/filter/Plugin/Filter/FilterHtml.php b/core/modules/filter/lib/Drupal/filter/Plugin/Filter/FilterHtml.php
index 368b422..c939c27 100644
--- a/core/modules/filter/lib/Drupal/filter/Plugin/Filter/FilterHtml.php
+++ b/core/modules/filter/lib/Drupal/filter/Plugin/Filter/FilterHtml.php
@@ -12,7 +12,7 @@
 use Drupal\filter\Plugin\FilterBase;
 
 /**
- * @todo.
+ * Provides a filter to limit allowed HTML tags.
  *
  * @Filter(
  *   id = "filter_html",
diff --git a/core/modules/filter/lib/Drupal/filter/Plugin/Filter/FilterHtmlCorrector.php b/core/modules/filter/lib/Drupal/filter/Plugin/Filter/FilterHtmlCorrector.php
index 68903c5..3f6b8e3 100644
--- a/core/modules/filter/lib/Drupal/filter/Plugin/Filter/FilterHtmlCorrector.php
+++ b/core/modules/filter/lib/Drupal/filter/Plugin/Filter/FilterHtmlCorrector.php
@@ -12,7 +12,7 @@
 use Drupal\filter\Plugin\FilterBase;
 
 /**
- * @todo.
+ * Provides a filter to correct faulty and chopped off HTML.
  *
  * @Filter(
  *   id = "filter_htmlcorrector",
diff --git a/core/modules/filter/lib/Drupal/filter/Plugin/Filter/FilterHtmlEscape.php b/core/modules/filter/lib/Drupal/filter/Plugin/Filter/FilterHtmlEscape.php
index 1aba45f..f4a3694 100644
--- a/core/modules/filter/lib/Drupal/filter/Plugin/Filter/FilterHtmlEscape.php
+++ b/core/modules/filter/lib/Drupal/filter/Plugin/Filter/FilterHtmlEscape.php
@@ -12,7 +12,7 @@
 use Drupal\filter\Plugin\FilterBase;
 
 /**
- * @todo.
+ * Provides a filter to display any HTML as plain text.
  *
  * @Filter(
  *   id = "filter_html_escape",
diff --git a/core/modules/filter/lib/Drupal/filter/Plugin/Filter/FilterHtmlImageSecure.php b/core/modules/filter/lib/Drupal/filter/Plugin/Filter/FilterHtmlImageSecure.php
index 2b5728e..e919939 100644
--- a/core/modules/filter/lib/Drupal/filter/Plugin/Filter/FilterHtmlImageSecure.php
+++ b/core/modules/filter/lib/Drupal/filter/Plugin/Filter/FilterHtmlImageSecure.php
@@ -12,7 +12,7 @@
 use Drupal\filter\Plugin\FilterBase;
 
 /**
- * @todo.
+ * Provides a filter to restrict images to site.
  *
  * @Filter(
  *   id = "filter_html_image_secure",
diff --git a/core/modules/filter/lib/Drupal/filter/Plugin/Filter/FilterUrl.php b/core/modules/filter/lib/Drupal/filter/Plugin/Filter/FilterUrl.php
index be3da17..4b432b6 100644
--- a/core/modules/filter/lib/Drupal/filter/Plugin/Filter/FilterUrl.php
+++ b/core/modules/filter/lib/Drupal/filter/Plugin/Filter/FilterUrl.php
@@ -12,7 +12,7 @@
 use Drupal\filter\Plugin\FilterBase;
 
 /**
- * @todo.
+ * Provides a filter to convert URLs into links.
  *
  * @Filter(
  *   id = "filter_url",
diff --git a/core/modules/filter/tests/filter_test/lib/Drupal/filter_test/Plugin/Filter/FilterTestReplace.php b/core/modules/filter/tests/filter_test/lib/Drupal/filter_test/Plugin/Filter/FilterTestReplace.php
index d678218..df208e2 100644
--- a/core/modules/filter/tests/filter_test/lib/Drupal/filter_test/Plugin/Filter/FilterTestReplace.php
+++ b/core/modules/filter/tests/filter_test/lib/Drupal/filter_test/Plugin/Filter/FilterTestReplace.php
@@ -12,7 +12,7 @@
 use Drupal\filter\Plugin\FilterBase;
 
 /**
- * @todo.
+ * Provides a test filter to replace all content.
  *
  * @Filter(
  *   id = "filter_test_replace",
diff --git a/core/modules/filter/tests/filter_test/lib/Drupal/filter_test/Plugin/Filter/FilterTestUncacheable.php b/core/modules/filter/tests/filter_test/lib/Drupal/filter_test/Plugin/Filter/FilterTestUncacheable.php
index 96d345a..7c3140d 100644
--- a/core/modules/filter/tests/filter_test/lib/Drupal/filter_test/Plugin/Filter/FilterTestUncacheable.php
+++ b/core/modules/filter/tests/filter_test/lib/Drupal/filter_test/Plugin/Filter/FilterTestUncacheable.php
@@ -12,7 +12,7 @@
 use Drupal\filter\Plugin\FilterBase;
 
 /**
- * @todo.
+ * Provides a test filter that is uncacheable.
  *
  * @Filter(
  *   id = "filter_test_uncacheable",