Restrict some special characters in description field of master items.

Hi,

I want to restrict some special characters(~ @ _ - + = { [ } ] \ ; ? < > ?). I am achieving it through form personalization but functionality is not working. I am putting details below

Trigger event — when-new-item-instance

Trigger object — MTL_SYSTEM_ITEMS.DESCRIPTION_MIR

Condition — :MTL_SYSTEM_ITEMS.DESCRIPTION_MIR IS NOT NULL
AND :MTL_SYSTEM_ITEMS.DESCRIPTION_MIR = REGEXP_REPLACE(:MTL_SYSTEM_ITEMS.DESCRIPTION_MIR, '[~ @ _ - + = { [ } ] \ ; ? < > ?]')

Attaching snap for reference, Please help!