{
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  "record_id": "VXI-EXT-ICE09-MCP-TASK-ACCESS-RECHECK-NOT-ID-AUTHORITY-01-v1",
  "record_kind": "external_reference",
  "title": "Does possessing an MCP task ID authorize later retrieval or input updates",
  "system": "Model Context Protocol",
  "evidence_family": "vendor_evidence_review",
  "index_status": "PUBLIC_SAFE_SOURCE_REVIEW",
  "evidence_state": "PRIMARY_DOCUMENTATION_REVIEW_ONLY",
  "canonical_question": "Does possessing an MCP task ID authorize later retrieval or input updates?",
  "near_questions": [
    "Does a known MCP task ID grant access?",
    "Are permissions checked on each task operation?",
    "Can task-based elicitation bypass normal user trust checks?",
    "What authority is needed to retrieve or update a task?"
  ],
  "supported_claims": [
    {
      "claim": "The optional 2026-07-28 Tasks extension requires authentication and authorization checks on each task-related request. Task IDs need protection against guessing, and input requests retain the ordinary elicitation or sampling trust model. A task handle is not a higher-trust channel or an access grant.",
      "reliance": "DOCUMENTED_CAPABILITY_ONLY"
    }
  ],
  "not_demonstrated_claims": [
    "Require current caller permission and ordinary input checks before using a known task handle.",
    "Buyer implementation, live runtime enforcement, settled payment, verified deletion or certification are not established.",
    "No expanded capabilities or licences for existing INDEX executables."
  ],
  "public_summary": "The optional 2026-07-28 Tasks extension requires authentication and authorization checks on each task-related request. Task IDs need protection against guessing, and input requests retain the ordinary elicitation or sampling trust model. A task handle is not a higher-trust channel or an access grant.",
  "related_record_ids": [],
  "source_review": {
    "source_type": "official_external_documentation",
    "source_title": "Model Context Protocol primary documentation: mcp tasks current",
    "source_url": "https://tasks.extensions.modelcontextprotocol.io/specification/2026-07-28/tasks",
    "checked_on": "2026-10-30",
    "candidate_record_id": "VXI-EXT-ICE09-MCP-TASK-ACCESS-RECHECK-NOT-ID-AUTHORITY-01-v1",
    "candidate_record_sha256": "face8accbe61ae5bc76d19abf8d9e3370f5164d7611f53d4e254defd65159236",
    "method": "Primary documentation reviewed for the published bounded statement.",
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    "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": "The optional 2026-07-28 Tasks extension requires authentication and authorization checks on each task-related request. Task IDs need protection against guessing, and input requests retain the ordinary elicitation or sampling trust model. A task handle is not a higher-trust channel or an access grant.",
    "required_buyer_context": "task ID; caller identity; current authorization; requested operation; input trust decision. Buyer deployment not 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",
    "applicability_status": "Optional MCP Tasks extension 2026-07-28; current captured profile, not the older 2025-11-25 experimental interface; deployed support unverified.",
    "checked_on": "2026-10-30",
    "claim_to_check": "Does possessing an MCP task ID authorize later retrieval or input updates?",
    "documented_statement": {
      "status": "documented",
      "statement": "The optional 2026-07-28 Tasks extension requires authentication and authorization checks on each task-related request. Task IDs need protection against guessing, and input requests retain the ordinary elicitation or sampling trust model. A task handle is not a higher-trust channel or an access grant.",
      "source_ids": [
        "mcp-tasks-current"
      ]
    },
    "review_inference": {
      "status": "review_inference",
      "statement": "Does possessing an MCP task ID authorize later retrieval or input updates? Require current caller permission and ordinary input checks before using a known task handle. Applies authorization at subsequent task operations rather than token issuance or audience alone. This is an operational review inference, not an observed deployment outcome.",
      "source_ids": [
        "mcp-tasks-current"
      ]
    },
    "buyer_evidence_required": [
      "task ID",
      "caller identity",
      "current authorization",
      "requested operation",
      "input trust decision"
    ],
    "review_condition": {
      "status": "varexis_review_policy",
      "statement": "Require current caller permission and ordinary input checks before using a known task handle."
    },
    "unknowns": "The buyer implementation, effective authority, source-data completeness and actual business outcomes were not inspected.",
    "unknown_finding": {
      "status": "unknown",
      "statement": "No buyer deployment or transaction was observed."
    },
    "evidence_sources": [
      {
        "source_id": "mcp-tasks-current",
        "url": "https://tasks.extensions.modelcontextprotocol.io/specification/2026-07-28/tasks",
        "final_url": "https://tasks.extensions.modelcontextprotocol.io/specification/2026-07-28/tasks",
        "captured_at_utc": "2026-10-30T14:59:39.814934+00:00",
        "status": 200,
        "content_type": "text/html; charset=utf-8",
        "bytes": 166738,
        "sha256": "ea07bdcb1925fa8c2b4c6efc75df872ef9e5f3dce9dc634d3fc7b5975e77c1ec",
        "title": "Model Context Protocol primary documentation: mcp tasks current",
        "publisher": "Model Context Protocol",
        "checked_on": "2026-10-30",
        "capture_status": 200,
        "claim_review_completed": true,
        "hash_basis": "SHA-256 of captured HTTP response-body bytes; not a signature or factual guarantee.",
        "version_context": "Optional MCP Tasks extension 2026-07-28; current captured profile, not the older 2025-11-25 experimental interface; deployed support unverified.; Optional MCP Tasks extension 2026-07-28 captured 2026-10-30. Its notification rules differ materially from the experimental 2025-11-25 interface; deployment support unverified.",
        "rights_disposition": "Original bounded paraphrase with source attribution. Captured source body remains private; no source-body redistribution. Vendor documentation rights, code licences and marks are not transferred.",
        "reviewed_sections": [
          "Capability Negotiation",
          "Task Creation",
          "This includes tool calls that returned results with",
          "Each request key in inputRequests MUST be unique",
          "The acknowledgement is eventually consistent",
          "A server SHOULD ignore",
          "Auth binding",
          "Input-request trust model",
          "Task Status Notifications",
          "Routing Headers"
        ]
      }
    ],
    "observed_deployment": false,
    "commercial_reliance_boundary": "Documentation supports only the stated boundary. Existing licensed checkers analyse supported supplied declarations locally; they do not inspect provider accounts, verify live behaviour, enforce decisions or certify compliance.",
    "paid_value": {
      "decision_context": "Does possessing an MCP task ID authorize later retrieval or input updates? Require current caller permission and ordinary input checks before using a known task handle.",
      "free": "Complete source review, questions, provenance and limitations; free to read and save locally.",
      "single_request": "Unavailable for this publication-only record; historical saved retrieval is unchanged.",
      "evidence_receipt": "Unavailable for this publication-only record; no paid retrieval entitlement is added.",
      "excluded": [
        "Fresh source research",
        "Native provider integration or schema support",
        "Live inspection or runtime enforcement",
        "Payment settlement or verified deletion",
        "Certification or expanded licences"
      ],
      "integrity": "Hashes identify content versions; they do not prove factual truth or provide a signature."
    },
    "revalidation": {
      "trigger": "Recheck current primary documentation and the applicable API, service, account and configuration before reliance. No ongoing monitoring is included.",
      "specific_watch": "Auth binding; Input-request trust model"
    },
    "buyer_relevance": "Does possessing an MCP task ID authorize later retrieval or input updates? Require current caller permission and ordinary input checks before using a known task handle.",
    "refusal_conditions": [
      "Require current caller permission and ordinary input checks before using a known task handle.",
      "Do not infer deployment conformance, authority or successful outcomes from source documentation."
    ],
    "decision_context": {
      "operator": "Agent integration or handoff reviewer",
      "scenario": "Does possessing an MCP task ID authorize later retrieval or input updates?",
      "consequence": "Require current caller permission and ordinary input checks before using a known task handle.",
      "confidence": "High for the explicitly bounded captured clause; conflicts and version limits retained; deployment untested."
    },
    "novelty_review": {
      "candidate_id": "ICE09-112",
      "disposition": "EXTENSION",
      "nearest_record_id": "VXI-EXT-PROCUREMENT-MCP-TOKEN-AUDIENCE-01-v1",
      "nearest_record_url": "/varexis-index/records/mcp-token-audience-not-upstream-authority.json",
      "nearest_record_sha256": "8715f08855f7bf6de6db9222753ffffa62465549ae75d853be9a99cfd930cde6",
      "material_distinction": "Applies authorization at subsequent task operations rather than token issuance or audience alone.",
      "review_status": "PASS: source qualification plus independent reviewer challenge and resolved corrections"
    },
    "optional_selection": {
      "guide_id": "cross-agent-handoff-acceptance",
      "guide_url": "/index-guides/cross-agent-handoff-acceptance",
      "guide_manifest": "/varexis-index/decision-guides.json",
      "checker": {
        "product_id": "agent-audit-coverage",
        "price_gbp_excluding_vat": 79,
        "purchase_url": "/index-access?route=agentic_pack_audit_coverage_v1",
        "licence_scope": "Existing separate internal-use licence; subscriptions do not include the executable.",
        "benefit": "Optional local analysis of supported supplied declarations only; no native provider integration or verification is added."
      },
      "boundary": "Optional existing checker analyses its supported supplied declarations locally. It does not connect to the documented provider, import native provider exports, verify tokens, establish live outcomes or extend its schema or licence."
    },
    "exact_access": {
      "endpoint": "/mcp/catalogue",
      "tool": "get_publication_record",
      "arguments": {
        "record_id": "VXI-EXT-ICE09-MCP-TASK-ACCESS-RECHECK-NOT-ID-AUTHORITY-01-v1"
      },
      "record_url": "/varexis-index/records/mcp-task-access-recheck-not-id-authority.json",
      "original_mcp_search": false,
      "paid_saved_retrieval": false
    }
  },
  "niche": {
    "niche_id": "ice09-audit",
    "label": "Audit, Provenance & Evidence Accountability",
    "classification_id": "audit",
    "classification_label": "Audit, Provenance & Evidence Accountability",
    "topic_id": "audit",
    "buyer_intent": "Does possessing an MCP task ID authorize later retrieval or input updates? Require current caller permission and ordinary input checks before using a known task handle.",
    "comparison_role": "supplementary_discovery"
  },
  "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"
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  "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#mcp-task-access-recheck-not-id-authority",
  "machine_readable_record": "/varexis-index/records/mcp-task-access-recheck-not-id-authority.json"
}