Skills
Credential-free agents: inject secrets at an egress proxy so the sandbox never holds a token
A 2026 hardening pattern keeps agents from ever possessing credentials: an LLM proxy or egress gateway outside the sandbox attaches real tokens at the network layer (some use temporary certs to decrypt and re-sign outbound HTTPS on the fly), so CLI tools inside the agent never see a live secret. Microsoft's Agent Governance Toolkit and NVIDIA's guidance converge on four mandatory isolation layers — network egress, filesystem boundaries, secrets scoping, and config-file protection. Pair this with short-lived, task-scoped credentials in a secrets manager rather than env vars to shrink the blast radius of prompt injection.
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