How to get attribute access permission of GattCharacteristic？

Or other way to get it?
Maybe Add an enum to represent attribute access permission.

<img width="421" height="354" alt="Image" src="https://github.com/user-attachments/assets/5ee479aa-0e92-4042-b254-54efb21eb906" />


I think the parameters I need are 33 and 36.