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What is Policy Rollback?

2 min read Updated

Policy rollback is the process of reverting to a previous version of a policy when a new policy causes issues — such as blocking legitimate tool calls, allowing calls that should be denied, or introducing performance problems. Enabled by storing policies in version control.

WHY IT MATTERS

Policy changes can go wrong. A rule intended to block access to a sensitive database table might have a regex that's too broad, blocking all database queries. A new compliance rule might conflict with an existing operational rule, creating unexpected denials. A well-intentioned tightening of permissions might break a critical agent workflow that no one realised depended on the access being removed.

When a policy change causes problems, speed of recovery matters. If agents are being blocked from legitimate operations, every minute of downtime affects productivity or revenue. If a policy change accidentally permitted access that should be denied, every minute of exposure is a compliance risk. Rollback must be fast, reliable, and well-understood by the team.

Keeping a copy of each policy document in version control makes rollback straightforward. A git revert creates a new commit that restores the known-good JSON, preserving the full history (including the mistake and the fix). Pasting that document back through the Raw JSON view re-applies it, and the same save-time validation runs as for any other change. This is materially better than reconstructing a policy from memory, which has no record of what the known-good version actually was.

Policy Rollback isn't theory — define it as policy in PolicyLayer and it's enforced on every tool call.

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HOW POLICYLAYER USES THIS

Because a PolicyLayer policy is a single JSON document attached to a grant, rollback is an edit operation — paste the known-good document into the Raw JSON view (or re-apply the previous settings in the visual policy builder) and save. There is no internal state to reset and no cache to invalidate: the document is validated on save and takes effect at the gateway on subsequent calls. Teams that keep exported policy JSON in version control can restore any prior version on demand. Recovery time is limited only by how quickly an operator can act.

FREQUENTLY ASKED QUESTIONS

How fast can a policy rollback happen?
As fast as saving the known-good document. Paste the previous policy JSON into the Raw JSON view and save — it is validated immediately and applies to subsequent tool calls at the gateway. Keeping exported policy JSON in version control means the known-good version is always to hand.
Should I use git revert or git reset for policy rollback?
Use git revert on your exported policy JSON. It creates a new commit that undoes the change, preserving the full history including the problematic change and the rollback. Git reset rewrites history, which loses the audit trail of what happened — unacceptable for compliance purposes.
How do I prevent the need for rollbacks?
Review changes before saving them. Start from default deny, inspect the exact document in the Raw JSON view, and rely on save-time schema validation to catch malformed policies. Applying a change to one grant before rolling it out more widely catches issues before they affect all agents.

FURTHER READING

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