WordPress at a glance
filter is not described

woocommerce_attribute_label filter-hook . WC 1.0

Usage

add_filter( 'woocommerce_attribute_label', 'filter_function_name_949', 10, 3 );
function filter_function_name_949( $label, $name, $product ){
	// filter...

	return $label;
}
$label
-
$name
-
$product
-

Where the hook is called

wc_attribute_label()
woocommerce_attribute_label
woocommerce/includes/wc-attribute-functions.php 211
return apply_filters( 'woocommerce_attribute_label', $label, $name, $product );

Where in WP core the hook is used WooCommerce

woocommerce/includes/wc-core-functions.php 44
add_filter( 'woocommerce_attribute_label', 'wp_kses_post', 100 );