{
  "schema": "varexis-public-evidence-record/0.3",
  "generated_at_utc": "2026-10-16T13:36:43.315Z",
  "record_id": "VXI-EXT-PROCUREMENT-SSM-HISTORY-READ-01-v1",
  "record_kind": "external_reference",
  "title": "Parameter history: Another path to current values",
  "system": "AWS Systems Manager",
  "evidence_family": "vendor_evidence_review",
  "index_status": "PUBLIC_SAFE_SOURCE_REVIEW",
  "evidence_state": "PRIMARY_DOCUMENTATION_REVIEW_ONLY",
  "canonical_question": "Does denying GetParameter prevent an agent from reading the current parameter value?",
  "near_questions": [
    "Can GetParameterHistory return the current version?",
    "Is history access only metadata?",
    "Are SecureString values included when decryption is allowed?",
    "Are retrieval permissions evaluated separately?",
    "Does denying GetParameter deny history too?",
    "Which KMS grants apply?",
    "Can earlier credentials remain in history?",
    "Does an inventory role include value-reading actions?",
    "Which parameter paths are in scope?",
    "Have all retrieval paths been reviewed?",
    "What evidence supports metadata-only access?",
    "Can I save this alternate-read-path review?"
  ],
  "supported_claims": [
    {
      "claim": "Parameter Store authorizes retrieval operations separately. GetParameterHistory can expose the current version as well as earlier values, including SecureString values when decryption is permitted. A denial of other retrieval actions is not evidence that the history path is closed. Parameter and KMS permissions require joint review.",
      "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": "Parameter Store authorizes retrieval operations separately. GetParameterHistory can expose the current version as well as earlier values, including SecureString values when decryption is permitted. A denial of other retrieval actions is not evidence that the history path is closed. Parameter and KMS permissions require joint review.",
  "related_record_ids": [],
  "source_review": {
    "source_type": "official_external_documentation",
    "source_title": "Systems Manager Parameter Store access",
    "source_url": "https://docs.aws.amazon.com/systems-manager/latest/userguide/parameter-store-setting-up.html",
    "checked_on": "2026-10-16",
    "candidate_record_id": "VXI-EXT-PROCUREMENT-SSM-HISTORY-READ-01-v1",
    "candidate_record_sha256": "3475a20ec1141b6b0683b3a8685c773cdb2de1cd3efe89665cac962d4c12e2f7",
    "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": "Parameter Store authorizes retrieval operations separately. GetParameterHistory can expose the current version as well as earlier values, including SecureString values when decryption is permitted. A denial of other retrieval actions is not evidence that the history path is closed. Parameter and KMS permissions require joint review.",
    "required_buyer_context": "Parameter identities, retrieval actions, history permissions and KMS grants. Effective configuration and dated operational evidence have not been inspected.",
    "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": "2026-10-16",
    "claim_to_check": "Denying the ordinary read API closes every route to a current parameter value.",
    "documented_statement": {
      "status": "documented",
      "statement": "Parameter Store authorizes retrieval operations separately. GetParameterHistory can expose the current version as well as earlier values, including SecureString values when decryption is permitted. A denial of other retrieval actions is not evidence that the history path is closed. Parameter and KMS permissions require joint review.",
      "source_ids": [
        "ssm"
      ]
    },
    "buyer_evidence_required": [
      "Effective permissions for each retrieval operation.",
      "Version-history access.",
      "Applicable KMS decryption grants."
    ],
    "review_condition": {
      "status": "varexis_review_policy",
      "statement": "Inspect history and decryption authority before approving metadata-only access."
    },
    "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": "ssm",
        "url": "https://docs.aws.amazon.com/systems-manager/latest/userguide/parameter-store-setting-up.html",
        "final_url": "https://docs.aws.amazon.com/systems-manager/latest/userguide/parameter-store-setting-up.html",
        "title": "Systems Manager Parameter Store access",
        "checked_on": "2026-10-16",
        "sha256": "7e511c7bfd8961994c476209050191f6dfb5bee33b9e68b4fc3b584e733e02fa",
        "bytes": 41651
      }
    ],
    "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 the access-path distinction behind a least-privilege review.",
      "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": "Parameter identities, retrieval actions, history permissions and KMS grants."
    }
  },
  "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#ssm-parameter-history-current-value-access",
  "machine_readable_record": "/varexis-index/records/ssm-parameter-history-current-value-access.json"
}