diff --git a/docs/getting-started.md b/docs/getting-started.md
index e9a3d22..158a633 100644
--- a/docs/getting-started.md
+++ b/docs/getting-started.md
@@ -110,12 +110,7 @@ function my_plugin_register_abilities() {
     wp_register_ability( 'my-plugin/get-site-title', array(
         'label'               => __( 'Get Site Title', 'my-plugin' ),
         'description'         => __( 'Retrieves the title of the current WordPress site.', 'my-plugin' ),
-        'category'            => 'site-info',
-        'input_schema'        => array(
-            'type'                 => 'object',
-            'properties'           => array(),
-            'additionalProperties' => false,
-        ),
+        'category'            => 'site',
         'output_schema'       => array(
             'type'        => 'string',
             'description' => 'The site title.',
diff --git a/docs/php-api.md b/docs/php-api.md
index 3e5665f..49d4f15 100644
--- a/docs/php-api.md
+++ b/docs/php-api.md
@@ -2,7 +2,14 @@
 
 ## Registering Categories
 
-Before registering abilities, you must register at least one category. Categories help organize abilities and make them easier to discover and filter.
+Before registering abilities, you need at least one category. Categories help organize abilities and make them easier to discover and filter.
+
+The Abilities API ships with two default Ability categories:
+
+- `site`: Abilities that retrieve or modify site information and settings
+- `user`: Abilities that retrieve or modify user information and settings.
+
+Only create new categories if your Ability does not fit one of these two.
 
 ### Function Signature