No Physical Attack is a limitation used on B53's Extra Arms, though Modifying ST rules allow it to be turned into a disadvantage for applying to the basic 1 or 2 limbs characters have.
That would probably be called No Physical Left Attack or similar.
MA114 clarifies this also means they are unable to grapple.
This causes some complications when grappling is used as a mechanic to represent holding a weapon, such as TG12's Seizing a Weapon or Object where an "attack" is used to apply Control Points in lieu of the usual Ready when used unopposed.
This is important since B53 only talks about restricting the use of MELEE weapons, but says "can still wield a firearm or ranged weapon".