How to obtain the agent spawn egg in Bedrock Edition?
I have made a agent "plugin" using the wsserver library. You can use it by going on https://repl.it/@behavingEffort/agent and using the command /connect agent.behavingeffort.repl.co/ws.
You can spawn the agent using the chat command ".agent tp" and you can use the full list of commands from this documentation: https://education.minecraft.net/wp-content/uploads/Code_Connection_API.pdf