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To encode tacit knowledge into a SOC agent, capture how experienced analysts make decisions—not just the procedures they follow. Work through real alerts with analysts, record the cues and evidence behind their choices, turn those decisions into organization-specific tasks and playbooks, and connect the agent’s recommendations to approved sources. Then review outcomes and update the material under controlled access. These five methods are a practical synthesis of NIST guidance and research; they have not been validated together as a single framework.
1. Elicit expertise from concrete cases
Analysts often rely on details that are difficult to express as general rules: a combination of telemetry, a known environment quirk, or a clue that changes the likely explanation for an alert. Asking an expert to “write down how you investigate” may miss those details. Instead, reconstruct specific decisions using past alerts, incidents, after-action reviews, and analyst corrections.
Ask about the decision, not just the procedure
For each case, capture what the analyst observed, what they inferred, what alternative explanations they considered, and what made them accept or reject each one. Ask what evidence would have changed their assessment, what they needed before containment, and when they would stop or escalate. Record uncertainty and exceptions rather than forcing a single definitive answer.
Keep context attached
Document the relevant system, data source, business process, and environment assumptions. A cue that matters in one organization may be irrelevant or misleading in another. NIST’s incident-response guidance treats lessons learned across response activities as input to continuing improvement, which makes reviewed incident records a useful source of examples—not a substitute for analyst interpretation.
2. Structure judgment as tasks, knowledge, and skills
Once a decision is understood, represent it in a form that can be reviewed, tested, and reused. NIST’s NICE Workforce Framework uses Task, Knowledge, and Skill statements: a task describes work to be done, knowledge describes concepts a person knows, and a skill describes what a person can do. The framework allows context-specific tasks, which is important because SOC work depends on local systems and procedures.
Build a decision record
A useful record for an agent can include:
- Task: the work the agent is helping with, such as triaging a particular class of alert.
- Inputs and context: required telemetry, asset or identity context, and relevant environmental assumptions.
- Knowledge: concepts, approved procedures, and known exceptions relevant to the task.
- Observable actions: checks the agent may perform, in an order that can be inspected.
- Decision cues: evidence that supports or weakens each interpretation, including uncertainty.
- Evidence threshold and boundaries: what must be established before recommending a response, and when to stop or escalate.
- Skill or outcome: what a competent analyst should be able to determine or produce.
This is a practical record design, not a schema prescribed by NIST. Keep local assumptions and exceptions with the task they qualify; detached notes are easy to overlook when a task is reused.
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3. Encode repeatable work in tailored playbooks
Use a playbook when a task has repeatable steps, but represent meaningful branches rather than forcing every case through one fixed path. NIST SP 800-184 describes a playbook as an actionable plan and emphasizes tailoring it to an organization’s people, processes, and technologies. Its focus is cybersecurity event recovery, so it should not be treated as a complete operational manual for every active incident.
Make decision points explicit
At each important branch, state what evidence supports the next step, what to do if evidence is missing or contradictory, and whether the agent may proceed. Mark stop, escalation, and human-approval points where the consequences are significant or the available evidence is incomplete. A playbook should also identify actions the agent is not authorized to take.
Separate reusable logic from local dependencies
Keep broadly applicable reasoning distinct from environment-specific details such as internal ownership, asset criticality, logging coverage, and escalation routes. NIST notes that incident-response details vary substantially across organizations; a static publication cannot supply every implementation detail. A generic playbook can provide a starting structure, but it cannot replace local validation.
4. Ground recommendations in traceable evidence
Give the agent access to approved, versioned internal procedures and relevant external defensive knowledge. For each recommendation, require it to identify the source that supports the retrieved fact and distinguish that fact from its own interpretation. This makes it easier for an analyst to verify whether advice is grounded in policy, threat information, or an inference that still needs review.
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Use knowledge mining as an aid, not a guarantee
A 2022 NIST publication by Khandakar Ashrafi Akbar, Sadaf MD Halim, Yibo Hu, Anoop Singhal, Latifur Khan, and Bhavani Thuraisingham describes a system that associates offensive techniques with defensive countermeasures and can rank suggested solutions. The authors’ abstract says the system can produce a ranked list for an analyst to try when the nature of an incoming attack is identified. That work supports using linked knowledge and ranked suggestions as a research direction; it does not establish that every deployed SOC agent will be accurate or safe to act on.
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Related NIST publication material on extracting attack techniques from cyber threat-intelligence reports describes active learning with a large language model. Extraction can help organize scattered knowledge, but extracted material still needs provenance and review before it becomes an operational instruction.
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5. Turn reviewed outcomes into controlled updates
Capture what happens after the agent offers help: whether an analyst accepts, corrects, or escalates the recommendation, and what the incident outcome establishes. Route that feedback to a review process that identifies which task record or playbook needs attention. NIST’s incident-response lifecycle, in SP 800-61 Rev. 3 finalized in April 2025, incorporates lessons learned into improvement; it supersedes Rev. 2.
Preserve provenance and scope
For each change, record the source case, affected environment or task, reviewer, approval, and effective version. Re-test affected scenarios before applying an update broadly. NIST establishes the value of continual improvement, but does not prescribe one universal review schedule or record format; organizations need to set those controls for their own risks and change processes.
How to apply the methods without giving the agent too much authority
Knowledge quality and action authority are separate design questions. A well-supported recommendation does not automatically authorize a system change. NIST’s 2025 agent-systems tool-use taxonomy distinguishes read-only access from constrained-write and write access, and discusses trusted and untrusted environments. Use that distinction to define what the agent can observe, recommend, or change; it is a design lens, not a complete operational security checklist.
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- Require analyst review for consequential actions or cases with incomplete evidence.
- Grant only the specific write capability needed for an approved task, rather than broad access.
- Keep approval points and escalation paths explicit in the playbook.
- Review incidents and corrections, then update and re-test knowledge through a controlled process.
There is no published result in the cited material showing that these five methods, used together, improve SOC accuracy, response time, or cost by a particular amount. Evaluate them against the organization’s own scenarios and operational controls rather than assuming a performance gain.
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