Copilot Plugin

Hi, 

We are trying to develop a plugin for copilot and are following these guides:

https://www.youtube.com/watch?v=HpgKKf6Ruek

https://www.youtube.com/watch?v=6ZNi1GDxvf0

When we deploy the plugin everything works in a chat and we can enable the plugin in Copilot.

However, no matter what question we ask it the plugin is never called - what are we doing wrong?