Prevent developers from using TOAD,other tools on production databases

When I was Browsing On internet Today i saw Amazing Article Talking about how to prevent Developers From using Toad and other tools on production Database its Small script (After Logon Trigger ) On database level :

    CONNECT / AS SYSDBA;
    
    CREATE OR REPLACE TRIGGER block_tools_from_prod
      AFTER LOGON ON DATABASE
    DECLARE
      v_prog sys.v_$session.program%TYPE;
    BEGIN
      SELECT program INTO v_prog
        FROM sys.v_$session
      WHERE  audsid = USERENV(‘SESSIONID’)
        AND  audsid != 0  — Don’t Check SYS Connections
        AND  ROWNUM = 1;  — Parallel processes will have the same AUDSID’s
    
      IF UPPER(v_prog) LIKE ‘%TOAD%’ OR UPPER(v_prog) LIKE ‘%T.O.A.D%’ OR — Toad
         UPPER(v_prog) LIKE ‘%SQLNAV%’ OR     — SQL Navigator
         UPPER(v_prog) LIKE ‘%PLSQLDEV%’ OR — PLSQL Developer
         UPPER(v_prog) LIKE ‘%BUSOBJ%’ OR   — Business Objects
         UPPER(v_prog) LIKE ‘%EXCEL%’       — MS-Excel plug-in
      THEN
         RAISE_APPLICATION_ERROR(-20000, ‘Development tools are not allowed here.’);
      END IF;
    END;
    /
    SHOW ERRORS

 Where I saw it :

http://www.psoug.org/snippet/Block_TOAD_and_other_tools_516.htm