diff --git a/libraries/io/eth/tb/vhdl/tb_tb_eth.vhd b/libraries/io/eth/tb/vhdl/tb_tb_eth.vhd
index 38fd02194b65992d4aaf760ca267c80860b37082..dfbcc715f952a98e6c7ad68133fa33b400684541 100644
--- a/libraries/io/eth/tb/vhdl/tb_tb_eth.vhd
+++ b/libraries/io/eth/tb/vhdl/tb_tb_eth.vhd
@@ -20,6 +20,13 @@
 --
 -------------------------------------------------------------------------------
 
+-- Purpose: Multi-testbench for eth
+-- Description:
+--   Verify eth for different data types
+-- Usage:
+--   > as 3
+--   > run -all
+
 LIBRARY IEEE, tech_tse_lib;
 USE IEEE.std_logic_1164.ALL;
 USE tech_tse_lib.tb_tech_tse_pkg.ALL;