Biosynthetic gene clusters

Hello everyone!

I would like to ask for help/advice regarding my methods. I have a metagenome data that I have assembled using metaspades, binned using metabat2, and annotated using Prokka. I only extracted specific genera of bacteria from the metadata. I wanted to analyze the biosynthetic gene clusters of these MAGs. I used anti-smash and Bagel4 for this but my question is.. How can I tell if a BGC have antiviral potential without the need of in vitro analysis?

The results I got from anti-smash looks like this (attached photo). Thank you very much! I hope you can help me.