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wire 2026-10-27
stories 8

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DockerDeployer env stops overriding governance settings, Guardrails validates tool-rail models at load

By RepoJournal · Filed · About Agent Security · Composed from the cited sources · methodology

Two fixes for operators of the agent governance stack: the Agent Governance Toolkit runtime now refuses a container deploy whose env would silently disable the kill switch, and Guardrails catches a missing judge model when config loads instead of on the rail's first run.

fix(agent-runtime): stop DockerDeployer env from overriding governance settings (#4409) microsoft/agent-governance-toolkit

by Shivam Sharma

DockerDeployer used to put the AGT_* variables derived from GovernanceConfig on the docker run line before your own env entries, and since Docker keeps the last -e for a name, env={"AGT_KILL_SWITCH": "false"} started the container with the kill switch off even when config.kill_switch_enabled was True; the same held for the policy path, trust level, audit flag and limits. deploy now raises Va[se...

feat(config): Check model references in tool rails NVIDIA-NeMo/Guardrails

by tgasser-nv

A tool rail whose manifest binds a model, such as a judge named by $model= on tool safety check, used to go unchecked against your configured models, so a missing one only surfaced when IORails built the engine or on the rail's first run. The new RailsConfig validator check_model_exists_for_tool_rails covers every flow in rails.tool_call and rails.tool_result, global and per_tool, so a typo in ...

ci: add generate_workflows.py --sync-registry to adopt Dependabot action bumps microsoft/agent-governance-toolkit

by chopmob-cloud

generate_workflows.py gains a --sync-registry mode that reads a bumped pin back out of the generated workflow files and updates .github/ci/actions.toml, the source of truth Dependabot cannot edit; previously an actions major left policy-engine-ci.yml drifting from the registry and --check failing until a maintainer hand-synced it. Relevant only if you maintain the pipeline, but it keeps the reg...

Quick answers

What shipped in Agent Security on October 27, 2026?
Two fixes for operators of the agent governance stack: the Agent Governance Toolkit runtime now refuses a container deploy whose env would silently disable the kill switch, and Guardrails catches a missing judge model when config loads instead of on the rail's first run. In total, 4 commits and 4 pull requests landed.
Who contributed to Agent Security on October 27, 2026?
3 developers shipped this update, including chopmob-cloud, Shivam Sharma, and tgasser-nv.
What were the notable Agent Security updates?
fix(agent-runtime): stop DockerDeployer env from overriding governance settings (#4409), feat(config): Check model references in tool rails, and ci: add generate_workflows.py --sync-registry to adopt Dependabot action bumps.