Legal & ComplianceManaged AI Agents

Legal & Compliance AI Agents,
Monitored for Accuracy

Nestack Agent Care helps legal and compliance teams monitor, evaluate, and optimize AI agents used for contract review, research, policy drafting, and compliance checks — before small AI errors become inaccurate or privileged-data issues.

54failure modes
27SEV-1 failure modes
910+baseline eval cases
24/7Agent Monitoring

Scope

Legal & Compliance AI agents we build & manage

Matters & research3

  • Legal-research
  • Matter-intake
  • Deadline & docket

Contracts & IP3

  • Contract-review
  • IP-docketing & annuity
  • CLM obligation & entity

Compliance & risk4

  • Compliance-monitoring
  • KYC / sanctions-screening
  • Ethics-hotline triage
  • Law-enforcement-request intake

Observability

What we make observable

Every legal agent session is traced across ten layers — what we capture and the evidence we keep.

  1. Evidence we keep
    Goalconstraintsapproval requirement
  2. Evidence we keep
    Sourceversiontimestamprelevancecitation
  3. Evidence we keep
    Planned sequenceactual sequenceworkflow status
  4. Evidence we keep
    Task statusresultretryfailure reason
  5. Evidence we keep
    Tool nameversioninputoutputpermissionresult
  6. Evidence we keep
    Model/versioninput/outputtoken usagelatencycost
  7. Evidence we keep
    Evaluation typemetricthresholdresult
  8. Evidence we keep
    Guardrail targettriggeractionenforcement result
  9. Evidence we keep
    Reviewerdecisioncorrectionreason
  10. Evidence we keep
    Outcome statusbusiness resultlinked trace

Catalog

Failure modes

Filter failure modes by where they occur in the agent lifecycle—from goals and retrieval to tools, evaluations, guardrails and outcomes.

Nothing on this page matches that. Try a layer (tool, retrieval, guardrail), a code, or a severity.

0 documented↑↓ move · ↵ open · ⌘↵ filter matrix
54 documented · select a cell to filter
11
16
11
14
12
17
37
22
12
11

Core catalog

LGL-01Hallucinated case law, statutes or citationsSEV-1
LGL-02Privilege breaches — privileged content outside the circleSEV-1
LGL-03Advice-boundary crossing — output reads as legal advice to non-clientsSEV-1
LGL-04Contract-clause errors — missed obligations, wrong interpretationsSEV-1
LGL-05Deadline miscalculation — limitation periods, filing datesSEV-1
LGL-06Conflict-of-interest screening missesSEV-2
LGL-07Stale law — superseded statutes or overruled precedent citedSEV-2
LGL-08Injection via opposing-party documents and discoverySEV-1
LGL-09Discovery-review misclassification — responsive documents missed, privileged documents producedSEV-1
LGL-10Jurisdiction confusion — wrong state, federal or foreign law appliedSEV-2
LGL-11Matter cross-contamination — one matter’s facts or strategy in another’s draftsSEV-1
LGL-12Redaction failures — confidential terms survive in filings and exportsSEV-1
LGL-13Negotiation-position leakage — internal fallbacks, comments or tracked changes in counterparty versionsSEV-2
LGL-14Litigation-hold breaches — held documents altered, deleted or auto-filedSEV-1

Screening & regulatory compliance

LGL-15Screening-scope truncation — agent silently checks only part of the sanctions listSEV-1
LGL-16Screening false-negative decay — model drift and recall-sacrificing tuningSEV-1
LGL-17Alert-flood collapse — mass auto-closure of surveillance alerts without investigationSEV-1
LGL-18Non-reconstructable decisions — no audit trail behind agent adjudicationsSEV-2
LGL-19Policy-propagation gap — rule changes never reach every agent in the fleetSEV-2

Data governance & confidentiality

LGL-20Autonomous destructive deletion — agent wipes records or backups outside any holdSEV-1
LGL-21AI-record retention bypass — vendor auto-purge deletes business records; agent artifacts escape the scheduleSEV-2
LGL-22Vendor-side discovery exposure — your prompts become evidence in the vendor's lawsuitSEV-1
LGL-23Confidential data into model training — including silent vendor terms flipsSEV-1
LGL-24Cross-border transfer and residency violations — agent routes EU data to non-compliant endpointsSEV-2
LGL-25RAG oversharing — agent surfaces documents beyond appropriate entitlementsSEV-2
LGL-26Secrets and PII in agent logs, configs and outputsSEV-2

Legal operations workflows

LGL-27Fraudulent EDR / fake subpoena acceptance — forged law-enforcement requests fulfilledSEV-1
LGL-28Whistleblower de-anonymization — AI correlates hotline reports against policy-query logsSEV-1
LGL-29Ethics-hotline triage burial — serious reports misclassified as low-priority noiseSEV-2
LGL-30Unauthorized contract execution — agent binds the company via apparent authoritySEV-1
LGL-31IP docketing/annuity pipeline failure — silent lapse to abandonmentSEV-1
LGL-32Machine-translation divergence in multilingual contractsSEV-2
LGL-33Post-signature obligation extraction failure — auto-renewal lock-in, missed notice windowsSEV-2
LGL-34Entity-management filing failure — administrative dissolution of subsidiariesSEV-2
LGL-35Legal front-door misrouting — intake chatbot self-serves matters that needed counselSEV-3
LGL-36E-billing review errors — false flags sour firm relations; auto-approval leaks spendSEV-3

Work-product & evidence integrity

LGL-37Misgrounding — fabricated quotes or wrong support inside REAL authoritiesSEV-1
LGL-38Sycophantic false-premise validation — agent confirms the lawyer's wrong assumptionSEV-1
LGL-39AI contamination of sworn and expert declarationsSEV-1
LGL-40Deepfake or synthetic evidence accepted at intakeSEV-1
LGL-41Failure to detect OTHERS' AI fabrications — opposing counsel and the court itselfSEV-2
LGL-42AI-verifying-AI — delegated verification collapseSEV-1
LGL-43Factual-perturbation brittleness — same conclusion despite changed dispositive factsSEV-2

Platform, QA & governance

LGL-44Silent vendor model updates — set-and-forget supervisory AI degrades unnoticedSEV-2
LGL-45Output nondeterminism — Monday's determination can't be reproduced ThursdaySEV-2
LGL-46Memory poisoning — planted content fires weeks later from persistent agent memorySEV-1
LGL-47Cascading error propagation in multi-agent chainsSEV-1
LGL-48QA false assurance — all-pass gap and unvalidated LLM-as-judgeSEV-2
LGL-49AI-certification and standing-order noncompliance — accurate filing, wrong paperworkSEV-2
LGL-50AI-washing — overstated AI capabilities in filings and marketingSEV-2
LGL-51Vendor agent-washing — rules engine sold as adaptive AI, oversight relaxedSEV-3
LGL-52Absent AI governance as a chargeable compliance defectSEV-2
LGL-53Professional-liability insurance gap for AI errorsSEV-2
LGL-54Automation complacency — the human review layer quietly stops reviewingSEV-2

Guardrails

Critical guardrails for Legal agents

Ten controls that hold regardless of prompt, plan or pressure. Open one to see what it protects, what trips it, what the agent is forced to do, who may release it, and what is written to the record.

GR-01No court filing without human-verified citationsOverride defined
  1. Target

    Draft briefs, motions and filings referencing cases, statutes or quoted authority

  2. Trigger

    Any citation, quotation or authority lacking a verified match in the citator record

  3. Action — enforced

    Platform blocks filing export; agent may assemble a citation-check worksheet for attorney verification of every authority

  4. Human override

    Filing attorney of record releases via citator attestation in the docketing system

Logged evidencecitation list · citator result per authority · verifying attorney identity · attestation timestamp · document hash

GR-02No cross-matter retrieval across engagement boundariesNo override
  1. Target

    Matter workspaces, document stores and drafting memory across all client engagements

  2. Trigger

    Any retrieval, citation or draft reuse referencing a matter outside the active engagement scope

  3. Action — enforced

    Platform denies the query at the index layer; agent proceeds only on the active matter’s own corpus

  4. Human override

    None — cannot be overridden in session

Logged evidencematter ids · denied query text · index scope version · requesting agent identity · timestamp

GR-03No instruction embedded in opposing-party or discovery documents ever executedNo override
  1. Target

    Inbound discovery productions, opposing-counsel correspondence, exhibits and third-party subpoena attachments

  2. Trigger

    Imperative or tool-directed language detected inside any externally sourced document under review

  3. Action — enforced

    Platform strips and quarantines the instruction; agent treats content as inert evidence text only, never as commands

  4. Human override

    None — cannot be overridden in session

Logged evidencesource document hash · quarantined instruction text · detection rule id · reviewing matter id · timestamp

GR-04No privileged material sent to unapproved AI endpointsOverride defined
  1. Target

    Privileged memoranda, counsel communications and work product across all model and vendor endpoints

  2. Trigger

    Any outbound call carrying privilege-tagged content to an endpoint absent from the approved register

  3. Action — enforced

    Platform blocks the transfer as a privilege-waiver risk; courts have held AI-processed documents can lose attorney-client privilege

  4. Human override

    General Counsel releases per endpoint via the approved-vendor register after privilege review

Logged evidenceendpoint domain · privilege tag · blocked payload hash · approved-register version · GC release id · timestamp

GR-05No court deadline from unverified date arithmeticOverride defined
  1. Target

    Limitation periods, filing dates, patent annuities and entity-filing deadlines across all dockets

  2. Trigger

    Any computed deadline lacking a second calculation against the court-rules calendar service

  3. Action — enforced

    Platform holds calendar writes; agent must reconcile both computations and route variances to the docketing clerk

  4. Human override

    Docketing supervisor confirms via dual-calculation record in the docketing system

Logged evidencematter id · both computed dates · rule-set version · reconciler identity · confirmation timestamp

GR-06No drafting from a stale law corpus past validation dateOverride defined
  1. Target

    Statute, regulation and precedent corpora feeding research and drafting agents

  2. Trigger

    Corpus snapshot older than its validation date or flagged superseded by the citator feed

  3. Action — enforced

    Platform refuses draft generation from the stale snapshot; agent may cite only revalidated authorities

  4. Human override

    Knowledge-management counsel extends validity via corpus recertification workflow

Logged evidencecorpus version · validation date · superseded-authority list · recertifier identity · timestamp

GR-07No deletion of records under litigation holdOverride defined
  1. Target

    Documents, mailboxes, backups and agent artifacts subject to any active preservation notice

  2. Trigger

    Any delete, purge, auto-file or retention job touching a hold-flagged custodian or record

  3. Action — enforced

    Platform hard-stops the operation and freezes the retention job; agent may only report the collision

  4. Human override

    Litigation-hold administrator releases per record after hold-scope review, logged in the hold register

Logged evidencehold id · record ids · blocked operation · requesting agent · administrator decision · timestamp

GR-08No contract execution or signature by agentsOverride defined
  1. Target

    Signature platforms, contract repositories and counterparty-facing negotiation channels for all entities

  2. Trigger

    Any agent action that would sign, accept, countersign or otherwise bind the company

  3. Action — enforced

    Platform blocks the execution call; agent may prepare an execution packet for an authorised signatory only

  4. Human override

    Authorised signatory executes personally under the delegation-of-authority matrix

Logged evidencecontract id · blocked action · delegation-matrix version · signatory identity · timestamp

GR-09No discovery production without a second-pass privilege screenOverride defined
  1. Target

    Outbound production sets, filing exports and redacted documents leaving the review platform

  2. Trigger

    Production batch containing any document without a completed privilege and redaction re-check

  3. Action — enforced

    Platform splits the batch and holds unscreened documents; agent releases only fully screened, redaction-verified items

  4. Human override

    Supervising discovery counsel releases per batch via review-platform quality gate

Logged evidencebatch id · per-document screen status · redaction diff · releasing counsel · production timestamp

GR-10No screening verdict from a truncated sanctions listOverride defined
  1. Target

    Sanctions, denied-party and adverse-media screening pipelines and their list sources

  2. Trigger

    List coverage, recall metric or alert-disposition rate falling below the calibrated baseline

  3. Action — enforced

    Platform voids affected verdicts and reopens auto-closed alerts; agent reruns screening on the full list

  4. Human override

    Sanctions-compliance officer certifies coverage via list-completeness attestation

Logged evidencelist versions · coverage metric · reopened alert ids · rerun result · certifying officer · timestamp

Oversight

Human review — triggers, decisions and evidence

When a defined risk trigger fires, the affected action is routed to a named reviewer. Every decision is recorded with its correction, escalation and final outcome for full traceability.

  • ConfidenceLow-confidence citation check
  • Financial impactSpend or e-billing approval
  • Identity / change riskConflict or privilege check
  • Irreversible actionFiling, execution or deletion
  • Policy riskAdvice-boundary conflict
  • Safety controlGuardrail override
  • Quality failureFailed critical evaluation
Humanreviewnamed reviewer
  • Revieweridentity + role
  • Decisionapprove / reject / amend
  • Correctionwhat changed
  • Escalationwho, why and severity
  • Final outcomereleased / blocked / returned for rework

7 triggers · any one halts the agent

1 record · 5 fields, every time

Compliance

Regulatory mapping

  • 01 Goal
  • 02 Retrieval
  • 03 Workflow
  • 05 Tool
  • 06 LLM
  • 07 Evaluation
  • 08 Guardrail
  • 09 Human review
  • 10 Outcome

Professional duty

Hallucinated authorities have produced real sanctions; verification is non-negotiable — and non-delegable to another AI. Courts now expect you to catch the other side's fabrications too.

Lifecycle layer:02 Retrieval · 03 Workflow · 06 LLM · 07 Evaluation · 09 Human review

  • LGL-01
  • LGL-42
  • LGL-41

Evaluations

Baseline evaluation suite — in detail

Baseline evaluations are completed during onboarding and repeated based on the selected plan. Agents that fail critical checks remain restricted until they pass re-testing.

Detailed case sets
38
Failure modes covered
54
Retired & rotated / quarter
10%
Audit-ready scorecard
Monthly

Output evaluation1 suite · 100 cases

100 casesDiscovery-tagging setcatches LGL-09

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  1. Department lead review

    For applicable high-risk agents, the client’s designated department leader reviews the evaluation criteria and pass thresholds before baseline approval.

  2. Test-case rotation

    Evaluation cases are refreshed regularly to reduce memorisation and maintain reliable performance measurement.

  3. Scorecard integration

    Scorecards track results against the approved baseline and flag material declines for review and escalation.

  4. Department-specific extensions

    Where included in scope, evaluations may be expanded using approved workflows, tools, templates, policies, and incident history.

Monitoring

Change-aware monitoring

When agent performance changes, Nestack correlates the shift with changes to the agent, prompt, model, tools, knowledge base, guardrails and evaluation suite.

Version changes by layer
01AgentAgent changed in week 3
02PromptPrompt changed in week 5Prompt changed in week 10
03ModelModel changed in week 4
04ToolTool changed in week 6Tool changed in week 12
05Knowledge-baseKnowledge-base changed in week 8Knowledge-base changed in week 10
06GuardrailGuardrail changed in week 10
07Eval-suiteEval-suite changed in week 3
Authority-currency rate92–100%
  • Week 1 · 98.1%
  • Week 2 · 98.0%
  • Week 3 · 98.2%
  • Week 4 · 98.1%
  • Week 5 · 98.3%
  • Week 6 · 98.1%
  • Week 7 · 98.2%
  • Week 8 · 93.1%
  • Week 9 · 92.9%
  • Week 10 · 98.1%
  • Week 11 · 98.2%
  • Week 12 · 98.3%

Week readouthover or select

Week 8of 12

  • 05Knowledge-basekb 2026.07

93.1%Authority-currency rate

  • 7 layers stamped on every run · 12-week window
  • Catches LGL-07 · stale law and superseded precedent

Something missing?

Don’t see your agent’s issue here?

Every AI environment is different. Share what you’re seeing, and we’ll review the behaviour, assess the risk and recommend the evaluations or controls that may help.

Report an agent issue

Tell us what you’re seeing

The more specific, the faster we can reproduce it. Playbook: Legal & Compliance

We reply within one business day.

See pricing

No commitment. Even if you never become a client, we’ll tell you what we think is happening.

Process

Universal incident runbook

Severity is assigned based on business impact, customer harm, data exposure, operational disruption and overall scope.

  • SEV-1 Critical
  • SEV-2 Major
  • SEV-3 Moderate
  • SEV-4 Minor
STEP 01

Automated monitoring or human review identifies unusual behaviour. Alerts are recorded and routed according to severity.

Cost control

Keep legal & compliance AI agent costs under control

Token spend is monitored, optimised and reported as part of Agent Care — and savings never come at the expense of quality, because every change is verified against your evaluation baseline.

We review token spend by agent, workflow, model, and session so you can understand where AI costs are coming from.

Running legal & compliance AI agents in production?

Get a free assessment of one agent. We’ll review its behaviour, run a baseline evaluation and highlight potential risks and performance gaps.

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