…CTA) guides people to their next step. You want your text to help people get where they want to go. For this reason the call to action needs to resonate with what people want to do. Here ‘OK’ is not a good call to action.
The above is a common problem in product writing. We don’t need a header here. This is common in interfaces. Because the design field shows some pre-existing text field, we feel we need to fill it in. You should avoid this, when you can instead practice content first design.