Sandbox

Definition

A sandbox places agent execution inside a controlled environment with explicit filesystem, process, network, secret, compute, and lifecycle boundaries. Isolation limits effects; it does not by itself determine whether an action is authorized or whether output is correct.

Isolation primitives are established; agent-specific stateful sandboxes and control integrations are still evolving.

Why it matters

The execution environment is part of the agent system, not background infrastructure.

Strong designs combine isolation with least privilege, policy enforcement, evidence, rollback, and tested termination.

System anatomy

Isolation

Separation from other tasks, tenants, hosts, and credentials.

Resource policy

Limits on network, CPU, memory, storage, time, and processes.

Lifecycle

Provisioning, checkpointing, teardown, and evidence capture.

Important distinctions

Authorization

A sandbox limits where execution occurs; policy decides whether a particular effect is allowed.

Container

A container can be one isolation primitive but is not automatically a complete security boundary.

Implementation signals

• Use per-task identity and isolated workspaces
• Default-deny egress and secret access
• Destroy or quarantine environments on terminal states

Failure modes

• Shared credentials defeat task isolation
• A sandbox has unrestricted network or host mounts

Sources and further study

1. Google Cloud — Agent Sandbox on GKE and Agent Substrate

   An agent-specific execution architecture emphasizing isolation, state, scheduling, and environment control.

   Use in this library: First-party case study. This first-party account documents one organization, product, or implementation context and should not be generalized without local evidence.

   engineering · engineering · Published 2026-05-20
2. OWASP GenAI Security Project — OWASP Top 10 for Agentic Applications 2026

   A threat-oriented reference for goal hijacking, tool misuse, identity abuse, memory poisoning, and cascading agent failures.

   Use in this library: Official guidance. Guidance describes recommended practice; citation does not prove that a control is implemented or effective in a particular environment.

   guidance · guidance · Published 2025-12
3. NIST — Zero Trust Architecture (NIST SP 800-207)

   Defines zero trust around explicit, continuously evaluated access decisions rather than implicit trust from network location.

   Use in this library: Standard or protocol. The publication is an enterprise security architecture, not an agent-specific verification standard; agent applications require additional threat and assurance analysis.

   standard · standard · Published 2020-08-11