diff --git a/core/modules/image/image.module b/core/modules/image/image.module
index aa05d04..52cde33 100644
--- a/core/modules/image/image.module
+++ b/core/modules/image/image.module
@@ -614,10 +614,17 @@ function image_style_load($name) {
 /**
  * Save an image style.
  *
- * @param style
- *   An image style array.
- * @return
- *   An image style array.
+ * @param array $style
+ *   An image style array containing:
+ *   - name: An unique name for the style.
+ *   - effects: An optional array of effects.
+ *
+ * @return array
+ *   An image style array containing:
+ *   - name: An unique name for the style.
+ *   - effects: An array of effects.
+ *   - is_new: Is set to TRUE if this is a new style, and FALSE if it is an
+ *   existing style.
  */
 function image_style_save($style) {
   $config = config('image.style.' . $style['name']);
diff --git a/core/modules/node/node.module b/core/modules/node/node.module
index 55e346e..dbadd19 100644
--- a/core/modules/node/node.module
+++ b/core/modules/node/node.module
@@ -500,11 +500,30 @@ function node_type_load($name) {
 /**
  * Saves a node type to the database.
  *
- * @param $info
+ * @param object $info
  *   The node type to save, as an object.
- *
- * @return
+ *   - type: A string. The machine name of the node type.
+ *   - name: A string. The human-readable name of the node type.
+ *   - base: A string that indicates the base string for hook functions. For
+ *   example, 'node_content' is the value used by the UI when creating a new
+ *   node type.
+ *   - description: A string that describes the node type.
+ *   - help: A string.
+ *   - custom: An integer.
+ *   - modified: TRUE or FALSE.
+ *   - locked: An integer.
+ *   - disabled: An integer.
+ *   - is_new: An integer.
+ *   - has_title: TRUE or FALSE.
+ *   - title_label: A string containing the label for the title.
+ *   - module: A string.
+ *   - orig_type: A string.
+ *   - old_type: A string.
+ *
+ * @return int
  *   Status flag indicating outcome of the operation.
+ *   A value of 1 indicates SAVED_NEW
+ *   A value of 2 indicates SAVED_UPDATED
  */
 function node_type_save($info) {
   $existing_type = !empty($info->old_type) ? $info->old_type : $info->type;