Type Of Action To Use Counterspell School Disruption Ability

[Chrion]

The CRB says that using Supernatural Abilities are standard actions unless defined otherwise by the ability's description. The Counterspell School Disruption (Su) ability reads, "As a melee touch attack, you can place a disruptive field around the target." Does this count as "defining otherwise", so that any time a Wizard could make a touch attack they could use this ability? Or does it still take a standard action to use, so that it couldn't be used as part of, for example, an attack of opportunity?

[Curghann]

The "melee touch" simply defines how to adjudicate applying the ability. Nowhere in the text does it say anything about swift/immediate/free actions, so it will default to the Standard action .

[blahpers]

Standard action.