WordPress at a glance
action is not described

manage_link_custom_column action-hook . WP 2.1.0

Fires for each registered custom link column.

Usage

add_action( 'manage_link_custom_column', 'action_function_name_9797', 10, 2 );
function action_function_name_9797( $column_name, $link_id ){
	// action...
}
$column_name(string)
Name of the custom column.
$link_id(int)
Link ID.

Where the hook is called

WP_Links_List_Table::column_default()
manage_link_custom_column
wp-admin/includes/class-wp-links-list-table.php 283
do_action( 'manage_link_custom_column', $column_name, $link->link_id );

Where the hook is used (in WP core)

Does not used.