diff --git a/src/wp-includes/taxonomy.php b/src/wp-includes/taxonomy.php
index 6aede0b329..7a6954f028 100644
--- a/src/wp-includes/taxonomy.php
+++ b/src/wp-includes/taxonomy.php
@@ -140,11 +140,14 @@ function create_initial_taxonomies() {
  *
  * @global array $wp_taxonomies The registered taxonomies.
  *
- * @param array $args An array of key => value arguments to match against the taxonomy objects.
- * @param string $output The type of output to return, either taxonomy 'names' or 'objects'. 'names' is the default.
- * @param string $operator The logical operation to perform. 'or' means only one element
- *  from the array needs to match; 'and' means all elements must match. The default is 'and'.
- * @return array A list of taxonomy names or objects
+ * @param array  $args     Optional. An array of `key => value` arguments to match against the taxonomy objects.
+ *                         Default empty array.
+ * @param string $output   Optional. The type of output to return in the array. Accepts either taxonomy 'names'
+ *                         or 'objects'. Default 'names'.
+ * @param string $operator Optional. The logical operation to perform. Accepts 'and' or 'or'. 'or' means only
+ *                         one element from the array needs to match; 'and' means all elements must match.
+ *                         Default 'and'.
+ * @return array A list of taxonomy names or objects.
  */
 function get_taxonomies( $args = array(), $output = 'names', $operator = 'and' ) {
 	global $wp_taxonomies;