choosing-an-environment changedmanaged-agents/choosing-an-environment

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1313An environment sets where your agent's tools and code run. They run in a sandbox. A sandbox is an isolated workspace, such as a container, where the agent runs commands and works on files. You have two options:

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1515* **Cloud environment:** Anthropic runs the sandbox for you. Each session gets its own fresh Linux container on Anthropic-managed infrastructure, with common languages, databases, and utilities already installed. You choose its network rules and any extra packages to install.

16* **Self-hosted sandbox:** You run the sandbox on your own infrastructure. Claude still runs on Anthropic's side and decides which tool to call next. A program that you run, called a worker, carries out the agent's bash and file tool calls on your machines and sends each result back. It can also serve custom tools.

16* **Self-hosted sandbox:** You run the sandbox on your own infrastructure. Claude still runs on Anthropic's side and determines which tool to call next. A program that you run, called a worker, carries out the agent's bash and file tool calls on your machines and sends each result back. It can also serve custom tools.

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1818The agent definition is the same whichever you choose. You set the model, prompt, and tools on the [agent](https://platform.claude.com/docs/en/managed-agents/agent-setup), not on the environment.

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