{
  "schema": "varexis-public-evidence-record/0.3",
  "generated_at_utc": "2026-10-14T20:21:57.226Z",
  "record_id": "VXI-EXT-PROCUREMENT-IAM-BOUNDARY-GRANTS-01-v1",
  "record_kind": "external_reference",
  "title": "AWS IAM: Permission boundaries and direct resource grants",
  "system": "AWS IAM",
  "evidence_family": "vendor_evidence_review",
  "index_status": "PUBLIC_SAFE_SOURCE_REVIEW",
  "evidence_state": "PRIMARY_DOCUMENTATION_REVIEW_ONLY",
  "canonical_question": "Does an IAM permissions boundary alone prove every access path is restricted?",
  "near_questions": [
    "Does an IAM boundary grant access on its own?",
    "Can a resource policy change the effective boundary review?",
    "Why does the principal type matter for AWS access?",
    "Are implicit and explicit denials equivalent?",
    "Does a role-session grant behave like a role grant?",
    "Which policies should procurement request for an agent?",
    "Can an attached boundary prove least privilege?",
    "What evidence supports a denied cloud operation?",
    "Does an identity policy alone explain all permissions?",
    "When should a boundary claim require more evidence?",
    "Can a session policy affect the access decision?",
    "Can I save the reviewed IAM policy limitations?"
  ],
  "supported_claims": [
    {
      "claim": "A boundary limits identity-policy permissions and grants nothing by itself. The documentation also distinguishes direct resource grants to users, roles and sessions, including cases not limited by an implicit boundary denial. Review principal type and resource policies alongside the boundary; explicit denials are a different case.",
      "reliance": "DOCUMENTED_CAPABILITY_ONLY"
    }
  ],
  "not_demonstrated_claims": [
    "Verified buyer configuration or effective access rights",
    "Independent execution, completeness or security testing",
    "Vendor certification, legal compliance or guaranteed suitability"
  ],
  "public_summary": "A boundary limits identity-policy permissions and grants nothing by itself. The documentation also distinguishes direct resource grants to users, roles and sessions, including cases not limited by an implicit boundary denial. Review principal type and resource policies alongside the boundary; explicit denials are a different case.",
  "related_record_ids": [
    "VXI-EXT-PROCUREMENT-KUBERNETES-SECRET-LIST-01-v1",
    "VXI-EXT-PROCUREMENT-AZURE-LOCK-PLANE-01-v1",
    "VXI-EXT-PROCUREMENT-CIRCLECI-CONTEXT-RESTRICTION-01-v1"
  ],
  "source_review": {
    "source_type": "official_external_documentation",
    "source_title": "IAM boundaries and resource-policy exceptions",
    "source_url": "https://docs.aws.amazon.com/IAM/latest/UserGuide/access_policies_boundaries.html",
    "checked_on": "2026-10-14",
    "candidate_record_id": "VXI-EXT-PROCUREMENT-IAM-BOUNDARY-GRANTS-01-v1",
    "candidate_record_sha256": "16380dbdb8e95b48c40650c845e5b4b1cc49a51eda6a7e1cb3644c3983667326",
    "method": "Primary documentation reviewed for the published bounded statement.",
    "deployment_tested_by_varexis": false,
    "revalidation": "The delivered snapshot preserves the review date shown. Recheck current primary documentation and deployment context before relying on present applicability; payment does not trigger fresh research."
  },
  "answer_policy": {
    "classification": "DOCUMENTED_WITH_DEPLOYMENT_BOUNDARY",
    "bounded_answer": "A boundary limits identity-policy permissions and grants nothing by itself. The documentation also distinguishes direct resource grants to users, roles and sessions, including cases not limited by an implicit boundary denial. Review principal type and resource policies alongside the boundary; explicit denials are a different case.",
    "required_buyer_context": "Principal type, identity/resource/session policies, boundary and account relationship.",
    "missing_evidence": "A broader claim needs evidence matching the intended use. Payment does not upgrade the evidence state."
  },
  "private_boundary": "Raw logs, thresholds, private paths, source code, protected mechanisms and reconstruction-level details are excluded from public and paid delivery.",
  "decision_profile": {
    "schema": "varexis-vendor-evidence-review/1",
    "review_status": "documentation_review_only",
    "checked_on": "2026-10-14",
    "claim_to_check": "The attached boundary establishes the complete effective permission limit.",
    "documented_statement": {
      "status": "documented",
      "statement": "A boundary limits identity-policy permissions and grants nothing by itself. The documentation also distinguishes direct resource grants to users, roles and sessions, including cases not limited by an implicit boundary denial. Review principal type and resource policies alongside the boundary; explicit denials are a different case.",
      "source_ids": [
        "iam-boundary"
      ]
    },
    "buyer_evidence_required": [
      "Exact principal and session type used by the agent.",
      "Relevant identity, resource and boundary policies.",
      "Evidence of explicit denials and evaluated access for the intended action."
    ],
    "review_condition": {
      "status": "varexis_review_policy",
      "statement": "Do not infer effective access from a boundary attachment alone."
    },
    "unknowns": "The buyer configuration, contract, effective entitlement and operational evidence have not been inspected. Missing evidence does not establish absence or failure of the feature.",
    "evidence_sources": [
      {
        "source_id": "iam-boundary",
        "url": "https://docs.aws.amazon.com/IAM/latest/UserGuide/access_policies_boundaries.html",
        "final_url": "https://docs.aws.amazon.com/IAM/latest/UserGuide/access_policies_boundaries.html",
        "title": "IAM boundaries and resource-policy exceptions",
        "checked_on": "2026-10-14",
        "sha256": "6881a9145fcf3dfd54d566aef9943ccfeae0afabf0ed074043048ada6995ee3c",
        "bytes": 47363
      }
    ],
    "observed_deployment": false,
    "commercial_reliance_boundary": "Procurement evidence support only; no supplier clearance, legal conclusion, configuration audit or verification of the buyer's claim is supplied.",
    "paid_value": {
      "decision_context": "Preserve which policy combinations still need review before accepting an access-limit claim.",
      "free": "Complete review, practical questions, sources and limitations; may be saved locally.",
      "single_request": "Existing server-saved version-bound route snapshot for later authenticated retrieval.",
      "evidence_receipt": "The same snapshot plus the existing unsigned delivery receipt.",
      "excluded": [
        "Fresh vendor research",
        "Continuous monitoring or change alerts",
        "Testing the buyer configuration",
        "Private evidence or vendor certification"
      ],
      "integrity": "Hashes identify content versions; they do not prove truth or provide a signature."
    },
    "revalidation": {
      "trigger": "A saved purchase does not recheck the source or buyer configuration.",
      "specific_watch": "Resource grants, session identities and boundary changes."
    }
  },
  "paid_access_note": "The full published answer and boundaries are free. Paid access saves the selected route and source versions, with an unsigned receipt when purchased. Preview coverage before paying. Fresh research, bespoke assessment and protected evidence are excluded.",
  "service_route": {
    "request_guide": "/varexis-index/request.html",
    "request_workflow": "/varexis-index/request-workflow.json",
    "service_id": "single_request",
    "service_routes_url": "/varexis-index/service-routes.json",
    "payment_required": true,
    "availability_endpoint": "/api/index/capabilities",
    "operational_status": "AUTOMATIC_SERVICE_CAPABILITIES_GATED",
    "checkout_url": "/index-access"
  },
  "authority_boundary": "VAREXIS-INDEX informs evidence reliance. It does not provide advice, certification, deployment authority, security assurance, production approval, or guarantee.",
  "human_page": "/varexis-index/catalog.html#iam-boundary-resource-grant-scope",
  "machine_readable_record": "/varexis-index/records/iam-boundary-resource-grant-scope.json"
}