There's no separate “Delete” in that menu. Use Archive for the extra agent, and it disappears from the list on the left.

Here's how:

1. Switch to the company view. Click the up/down arrows to the right of the workspace name in the top left, then choose “Open company view” near the bottom.

1. In the company view, hover over the agent you want to remove in the “Agents” list on the left. A “⋮” appears on its right. Open it and choose “Archive” at the bottom.

1. Click “Archive” and confirm.

Archiving is not deleting. The agent's files, conversation history and skills are all kept. It just stops running, so scheduled tasks and chat channels can no longer wake it, and it stops using an agent seat from your next invoice.

If you want it gone for good, delete it from the archive:

1. Click “Settings” at the bottom left, then go to “Space Settings → Archived Agents”. The agent you just archived is there, with “Restore” and “Delete” buttons on its right.

1. Click the red “Delete”, tick “I understand this action is irreversible”, then click “Delete”.

Think before you delete: the agent's Drive files, all conversation history with it, its connected chat channels and its automations are removed permanently and can't be recovered. If you only want it out of your list, or you're not sure you won't need it later, stop at Archive. You can click “Restore” at any time to bring it back.

Related question: can a message I already sent be deleted or unsent? See Can I delete or unsend a message I already sent to an agent?