---
title: Kei terms
type: reference
product: kei
nav_group: Reference
---

## Agent

An LLM configuration that a harness runs, including its model, instructions, and tools.

## Harness

Software that lets an agent use tools. A harness connects through an integration that sends governed operations to the Kei runtime.

## Workspace

A boundary for a team's connectors, users, groups, policies, and setup activity.