Bad screen-reader UX for Security Level/Shield button

We've received some feedback from JAWS screen reader users indicating that the Security Level button UX isn't quite working the same way as for seeing users. When using a screen reader, the button does not give any indication that the security level can be changed, or how one would do so.

My hunch is that the fix may be as simple as changing the language of the tooltip to indicate the button can be activated, which opens the Security Level panel. I'm currently waiting for feedback from the affected JAWS user to confirm this hunch.

Currently, the Security Level panel gives a short description of the current settings, as well as a button to get to the 'Advanced Security Preferences...'. I suspect the JAWS UX here is also less than ideal. We may also need to provide a tooltip to said button indicating that the security level can be modified here.