WordPress at a glance
filter is not described

tag_feed_link filter-hook . WP 2.3.0

Filters the post tag feed link.

Usage

add_filter( 'tag_feed_link', 'filter_function_name_3382', 10, 2 );
function filter_function_name_3382( $link, $feed ){
	// filter...

	return $link;
}
$link(string)
The tag feed link.
$feed(string)
Feed type.

Where the hook is called

get_term_feed_link()
wp-includes/link-template.php 840
$link = apply_filters( 'tag_feed_link', $link, $feed );

Where the hook is used (in WP core)

Does not used.