Copilot エージェント用の GitHub アプリの構成
https://docs.github.com/ja/copilot/building-copilot-extensions/creating-a-copilot-extension/configuring-your-github-app-for-your-copilot-agent
Developer settings
GitHub Apps
In the "GitHub Copilot Chat" row, select the Access: dropdown menu, then click Read-only.
This (*Inference description) will be the description users see when they hover over your agent's slug in the chat window.