WordPress at a glance
action is not described

manage_posts_custom_column action-hook . WP 1.5.0

Fires in each custom column in the Posts list table.

This hook only fires if the current post type is non-hierarchical, such as posts.

Usage

add_action( 'manage_posts_custom_column', 'action_function_name_9482', 10, 2 );
function action_function_name_9482( $column_name, $post_id ){
	// action...
}
$column_name(string)
The name of the column to display.
$post_id(int)
The current post ID.

Where the hook is called

WP_Posts_List_Table::column_default()
wp-admin/includes/class-wp-posts-list-table.php 1149
do_action( 'manage_posts_custom_column', $column_name, $post->ID );

Where the hook is used (in WP core)

Does not used.