How do I find out what entitlements an app has?
After some more searching, I found a command-line answer:

codesign -d --entitlements :- /Applications/Whatever.app/


This will print out an XML plist with values like:

&lt;key&gt;com.apple.security.app-sandbox&lt;/key&gt;
&lt;true/&gt;
&lt;key&gt;com.apple.security.files.user-selected.read-write&lt;/key&gt;
&lt;true/&gt;


For more information see https://developer.apple.com/library/archive/qa/qa1798/_index.html#//apple_ref/doc/uid/DTS40014167-CH1-IOS_STEPS

If anyone knows an easier/nicer way, though, I'd love to hear it.