Force Alt Text In Beaver Builder

Hello!
I’m trying to enforce an alternative text in Beaver Builder when uploading an image. Without the alternative text, one should not be able to upload the image. Does anyone have the knowledge for that?

The image uploaded used by Beaver Builder is actually the built in WordPress media modal, exactly the same as you use in wp-admin. It might be extendable but there is not much useful documentation.

https://codex.wordpress.org/Javascript_Reference/wp.media

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