diff --git a/src/wp-admin/network/edit.php b/src/wp-admin/network/edit.php
index b1ae4bbb05..337a58e886 100644
--- a/src/wp-admin/network/edit.php
+++ b/src/wp-admin/network/edit.php
@@ -18,9 +18,24 @@ if ( empty( $_GET['action'] ) ) {
 	exit;
 }
 
-do_action( 'wpmuadminedit' , '' );
+/**
+ * Fires just before the action handler in several Network Admin screens.
+ *
+ * This hook fires on multiple screens in the Multisite Network Admin,
+ * including Users, Network Settings, and Site Settings.
+ *
+ * @since 3.0.0
+ */
+do_action( 'wpmuadminedit' );
 
-// Let plugins use us as a post handler easily
+/**
+ * Fires the requested handler action.
+ *
+ * The dynamic portion of the hook name, $_GET['action'], refers to the name
+ * of the requested action.
+ *
+ * @since 3.1.0
+ */
 do_action( 'network_admin_edit_' . $_GET['action'] );
 
 wp_redirect( network_admin_url() );
diff --git a/src/wp-admin/network/sites.php b/src/wp-admin/network/sites.php
index c5d353a97a..37f64407e4 100644
--- a/src/wp-admin/network/sites.php
+++ b/src/wp-admin/network/sites.php
@@ -49,7 +49,8 @@ get_current_screen()->set_help_sidebar(
 $id = isset( $_REQUEST['id'] ) ? intval( $_REQUEST['id'] ) : 0;
 
 if ( isset( $_GET['action'] ) ) {
-	do_action( 'wpmuadminedit' , '' );
+	/** This action is documented in wp-admin/network/edit.php */
+	do_action( 'wpmuadminedit' );
 
 	if ( 'confirm' === $_GET['action'] ) {
 		check_admin_referer( 'confirm' );
diff --git a/src/wp-admin/network/users.php b/src/wp-admin/network/users.php
index 415b0c2104..9db1561986 100644
--- a/src/wp-admin/network/users.php
+++ b/src/wp-admin/network/users.php
@@ -87,7 +87,8 @@ function confirm_delete_users( $users ) {
 }
 
 if ( isset( $_GET['action'] ) ) {
-	do_action( 'wpmuadminedit' , '' );
+	/** This action is documented in wp-admin/network/edit.php */
+	do_action( 'wpmuadminedit' );
 
 	switch ( $_GET['action'] ) {
 		case 'deleteuser':