diff --git a/packages/block-editor/src/hooks/custom-class-name.js b/packages/block-editor/src/hooks/custom-class-name.js
index b28ded7b9d0663..fa1a1cadc5712a 100644
--- a/packages/block-editor/src/hooks/custom-class-name.js
+++ b/packages/block-editor/src/hooks/custom-class-name.js
@@ -18,8 +18,7 @@ import { createHigherOrderComponent } from '@wordpress/compose';
 import { InspectorControls } from '../components';
 
 /**
- * Filters registered block settings, extending attributes with anchor using ID
- * of the first node.
+ * Filters registered block settings, extending attributes to include `className`.
  *
  * @param {Object} settings Original block settings.
  *
@@ -42,6 +41,7 @@ export function addAttribute( settings ) {
 /**
  * Override the default edit UI to include a new block inspector control for
  * assigning the custom class name, if block supports custom class name.
+ * The control is displayed within the Advanced panel in the block inspector.
  *
  * @param {WPComponent} BlockEdit Original component.
  *
@@ -89,8 +89,8 @@ export const withInspectorControl = createHigherOrderComponent(
 );
 
 /**
- * Override props assigned to save component to inject anchor ID, if block
- * supports anchor. This is only applied if the block's save result is an
+ * Override props assigned to save component to inject the className, if block
+ * supports customClassName. This is only applied if the block's save result is an
  * element and not a markup string.
  *
  * @param {Object} extraProps Additional props applied to save element.
diff --git a/packages/block-editor/src/hooks/custom-class-name.native.js b/packages/block-editor/src/hooks/custom-class-name.native.js
index ea2d98068b7863..65ba2505053755 100644
--- a/packages/block-editor/src/hooks/custom-class-name.native.js
+++ b/packages/block-editor/src/hooks/custom-class-name.native.js
@@ -10,8 +10,7 @@ import { addFilter } from '@wordpress/hooks';
 import { hasBlockSupport } from '@wordpress/blocks';
 
 /**
- * Filters registered block settings, extending attributes with anchor using ID
- * of the first node.
+ * Filters registered block settings, extending attributes to include `className`.
  *
  * @param {Object} settings Original block settings.
  *
@@ -32,8 +31,8 @@ export function addAttribute( settings ) {
 }
 
 /**
- * Override props assigned to save component to inject anchor ID, if block
- * supports anchor. This is only applied if the block's save result is an
+ * Override props assigned to save component to inject the className, if block
+ * supports customClassName. This is only applied if the block's save result is an
  * element and not a markup string.
  *
  * @param {Object} extraProps Additional props applied to save element.