WordPress at a glance
action is not described

before_wp_tiny_mce action-hook . WP 3.2.0

Fires immediately before the TinyMCE settings are printed.

Usage

add_action( 'before_wp_tiny_mce', 'action_function_name_5727' );
function action_function_name_5727( $mce_settings ){
	// action...
}
$mce_settings(array)
TinyMCE settings array.

Where the hook is called

_WP_Editors::editor_js()
wp-includes/class-wp-editor.php 1484
do_action( 'before_wp_tiny_mce', self::$mce_settings );

Where the hook is used (in WP core)

Does not used.