What this looks like in practice
The problem
SOC 2 auditors expect two things from any access log: that every entry is attributable to a specific principal, and that the log itself cannot be silently altered after the fact. Most AI agent deployments fail both by default — agents frequently share a single service credential across multiple workflows, and the logs those agents write to are stored in systems an administrator can edit without leaving a trace. Retrofitting attribution and tamper-evidence after an auditor has already asked for the evidence is a far more expensive, more disruptive project than building it in before the first agent goes into production.
What good looks like
A SOC 2-ready agent audit posture starts with identity, not logging — see SOC 2 for AI platforms for the broader control set this fits into. Every agent that authenticates against production systems should hold its own distinct credential, never shared with another agent or workflow, so that "which agent did this" is answerable from the credential alone without cross-referencing timestamps or best-guess correlation. Every authenticated interaction that credential performs should be written to a tamper-evident audit log — not just access-controlled, but cryptographically verifiable as unaltered, so an auditor's question "how do you know this log wasn't edited" has a technical answer, not a policy answer. Audit trails that hold up under review share this same attribution-plus-tamper-evidence bar.
Access to the systems that configure and manage agents also needs its own control: an operator who can silently reconfigure an agent's permissions or disable its logging is a gap in the same control auditors are checking, even if the agent's own actions are perfectly logged. The complete picture — distinct identity, tamper-evident logging, and role-restricted control-plane access — is what turns "we have logs" into "we have evidence an auditor accepts."
How Praesidia helps
Praesidia issues a distinct, non-shared credential to every agent, so every logged action is attributable to one identifiable principal without manual correlation. Every authenticated interaction is written to a tamper-evident, cryptographically verifiable audit log, giving auditors a technical answer to whether a log entry could have been altered after the fact. Access to the control plane where agents are configured is role-based, so the people who can change an agent's permissions or logging behavior are themselves limited and reviewable. Logs export in a format built for auditor review, removing the manual reconstruction step that turns audit prep into a scramble — the same identity-and-audit foundation covered in the site's AI governance guide.
Getting started
- Inventory every agent currently authenticating against production systems and flag any that share a credential with another agent or workflow.
- Replace shared credentials with a distinct identity per agent, prioritizing agents that touch systems already in SOC 2 scope.
- Confirm the audit log for agent activity is tamper-evident, not just access-controlled — ask specifically whether an administrator could edit a past entry without detection.
- Restrict and log access to the agent configuration layer itself, so changes to an agent's permissions are attributable the same way the agent's own actions are.
- Run an export of agent audit logs before the audit starts, to confirm the format and completeness an auditor will actually receive — the same completeness check described in how to audit AI agent activity.
Each step is cheaper to do before the audit period begins than during it. Auditors ask pointed questions about attribution and tamper-evidence specifically because those are the two properties hardest to reconstruct retroactively once a gap has already gone unnoticed for months.
FAQ
What do SOC 2 auditors actually ask for on AI agents? Evidence that access is attributable to a specific principal, that logs of that access cannot be silently altered, and that access to configure agents is itself role-restricted and reviewable.
Why aren't shared service accounts enough? A shared credential used by multiple agents makes every log entry ambiguous about which agent actually acted, which fails the attribution bar auditors check for directly.
How long should agent audit logs be retained? Retention should match the evidence window your SOC 2 audit period covers, typically 12 months, though the specific requirement depends on your auditor and report type.