diff --git a/inc/Admin/Page.php b/inc/Admin/Page.php
index 3fc2e6c..21756a6 100644
--- a/inc/Admin/Page.php
+++ b/inc/Admin/Page.php
@@ -131,7 +131,7 @@ class Page implements Registrable {
 	 *
 	 * @since 0.1.0
 	 *
-	 * @var string
+	 * @var string|false
 	 */
 	private string|false $hook_name = false;
 
@@ -245,7 +245,7 @@ private function get_callback(): \Closure {
 	 *
 	 * @since 0.1.0
 	 *
-	 * @return string The hook name of the menu page.
+	 * @return string|false The hook name of the menu page.
 	 */
 	public function get_hook_name(): string|false {
 		return $this->hook_name;
diff --git a/inc/Contracts/PostType.php b/inc/Contracts/PostType.php
index 0875984..e3c53c1 100644
--- a/inc/Contracts/PostType.php
+++ b/inc/Contracts/PostType.php
@@ -13,4 +13,10 @@
  * @since 0.3.2
  */
 interface PostType {
+	/**
+	 * Post type name.
+	 *
+	 * Implementations are expected to override this.
+	 */
+	public const string NAME = '';
 }
diff --git a/inc/PostMeta.php b/inc/PostMeta.php
index 4061a4d..bc08451 100644
--- a/inc/PostMeta.php
+++ b/inc/PostMeta.php
@@ -103,9 +103,8 @@ protected function post_type(): string {
 	 *
 	 * @since 0.1.0
 	 *
-	 * @return string Type of the data.
+	 * @return 'array'|'boolean'|'integer'|'number'|'object'|'string' Type of the data.
 	 */
-	/** @return 'array'|'boolean'|'integer'|'number'|'object'|'string' */
 	protected function type(): string {
 		return PostMetaArgs::TYPE_STRING;
 	}
diff --git a/inc/TermMeta.php b/inc/TermMeta.php
index 07f69da..89d71a4 100644
--- a/inc/TermMeta.php
+++ b/inc/TermMeta.php
@@ -103,9 +103,8 @@ protected function taxonomy(): string {
 	 *
 	 * @since 0.1.0
 	 *
-	 * @return string Type of the data.
+	 * @return 'array'|'boolean'|'integer'|'number'|'object'|'string' Type of the data.
 	 */
-	/** @return 'array'|'boolean'|'integer'|'number'|'object'|'string' */
 	protected function type(): string {
 		return TermMetaArgs::TYPE_STRING;
 	}