diff --git a/src/wp-admin/includes/taxonomy.php b/src/wp-admin/includes/taxonomy.php
index 14618f8888..a4fa571b55 100644
--- a/src/wp-admin/includes/taxonomy.php
+++ b/src/wp-admin/includes/taxonomy.php
@@ -15,8 +15,8 @@
  *
  * @since 2.0.0
  *
- * @param unknown_type $cat_name
- * @return unknown
+ * @param int|string $cat_name
+ * @return int
  */
 function category_exists($cat_name, $parent = 0) {
 	$id = term_exists($cat_name, 'category', $parent);
@@ -30,8 +30,8 @@ function category_exists($cat_name, $parent = 0) {
  *
  * @since 2.0.0
  *
- * @param unknown_type $id
- * @return unknown
+ * @param int $id
+ * @return object
  */
 function get_category_to_edit( $id ) {
 	$category = get_term( $id, 'category', OBJECT, 'edit' );
@@ -44,9 +44,9 @@ function get_category_to_edit( $id ) {
  *
  * @since 2.0.0
  *
- * @param unknown_type $cat_name
- * @param unknown_type $parent
- * @return unknown
+ * @param int|string $cat_name
+ * @param int        $parent
+ * @return int|WP_Error
  */
 function wp_create_category( $cat_name, $parent = 0 ) {
 	if ( $id = category_exists($cat_name, $parent) )
@@ -190,8 +190,8 @@ function wp_update_category($catarr) {
  *
  * @since 2.3.0
  *
- * @param unknown_type $tag_name
- * @return unknown
+ * @param int|string $tag_name
+ * @return mixed
  */
 function tag_exists($tag_name) {
 	return term_exists($tag_name, 'post_tag');
@@ -202,8 +202,8 @@ function tag_exists($tag_name) {
  *
  * @since 2.3.0
  *
- * @param unknown_type $tag_name
- * @return unknown
+ * @param int|string $tag_name
+ * @return array|WP_Error
  */
 function wp_create_tag($tag_name) {
 	return wp_create_term( $tag_name, 'post_tag');
@@ -214,8 +214,8 @@ function wp_create_tag($tag_name) {
  *
  * @since 2.3.0
  *
- * @param unknown_type $post_id
- * @return unknown
+ * @param int $post_id
+ * @return string|bool|WP_Error
  */
 function get_tags_to_edit( $post_id, $taxonomy = 'post_tag' ) {
 	return get_terms_to_edit( $post_id, $taxonomy);
@@ -226,8 +226,8 @@ function get_tags_to_edit( $post_id, $taxonomy = 'post_tag' ) {
  *
  * @since 2.8.0
  *
- * @param unknown_type $post_id
- * @return unknown
+ * @param int $post_id
+ * @return string|bool|WP_Error
  */
 function get_terms_to_edit( $post_id, $taxonomy = 'post_tag' ) {
 	$post_id = (int) $post_id;
@@ -273,8 +273,8 @@ function get_terms_to_edit( $post_id, $taxonomy = 'post_tag' ) {
  *
  * @since 2.8.0
  *
- * @param unknown_type $tag_name
- * @return unknown
+ * @param int|string $tag_name
+ * @return array|WP_Error
  */
 function wp_create_term($tag_name, $taxonomy = 'post_tag') {
 	if ( $id = term_exists($tag_name, $taxonomy) )