Every agent will need its own computer. And with new Hosted agents in Foundry, every agent gets its own dedicated enterprise-grade sandbox, with durable state, built-in identity and governance, and support for any harness or framework.

Read more:
https://devblogs.microsoft.com/foundry/introducing-the-new-hosted-agents-in-foundry-agent-service-secure-scalable-compute-built-for-agents/