WordPress at a glance
filter is not described

rest_route_data filter-hook . WP 4.4.0

Filters the publicly-visible data for routes.

This data is exposed on indexes and can be used by clients or developers to investigate the site and find out how to use it. It acts as a form of self-documentation.

Usage

add_filter( 'rest_route_data', 'filter_function_name_2734', 10, 2 );
function filter_function_name_2734( $available, $routes ){
	// filter...

	return $available;
}
$available(array)
Map of route to route data.
$routes(array)
Internal route data as an associative array.

Where the hook is called

WP_REST_Server::get_data_for_routes()
wp-includes/rest-api/class-wp-rest-server.php 1132
return apply_filters( 'rest_route_data', $available, $routes );

Where the hook is used (in WP core)

Does not used.