{ "schema": "varexis-index-free-publication-preview/1", "catalogue_version": "pub-9-tranche-59-v1", "route_id": "agentic_reviewed_resource_token_narrowing", "record_id": "VXI-EXT-PROCUREMENT-RESOURCE-TOKEN-NARROWING-01-v1", "question": "Can a multi-resource OAuth grant produce a token limited to one selected resource?", "answer": "RFC 8707 allows a token request to select a subset of the resources authorized by the grant. The resulting access token can be restricted to that subset while a refresh token remains associated with the full authorized set. Resource selection must remain within the grant and authorization-server policy; a narrow access token does not prove the underlying grant was reduced.", "records": [ { "record_id": "VXI-EXT-PROCUREMENT-RESOURCE-TOKEN-NARROWING-01-v1", "url": "/varexis-index/records/resource-token-narrowing.json", "content_sha256": "7ecbe4bbb715ce61bd720b6fd91a57e170999520e7d67ce64ee91f4551e9b420", "evidence": { "schema": "varexis-public-evidence-record/0.3", "generated_at_utc": "2026-10-25T20:55:19.974986+00:00", "record_id": "VXI-EXT-PROCUREMENT-RESOURCE-TOKEN-NARROWING-01-v1", "record_kind": "external_reference", "title": "OAuth refresh grant and requested resource subset", "system": "IETF RFC 8707", "evidence_family": "vendor_evidence_review", "index_status": "PUBLIC_SAFE_SOURCE_REVIEW", "evidence_state": "PRIMARY_DOCUMENTATION_REVIEW_ONLY", "canonical_question": "Can a multi-resource OAuth grant produce a token limited to one selected resource?", "near_questions": [ "Does a single-resource access token narrow its refresh grant?", "Can OAuth refresh select only part of an authorized resource set?", "What limits the resource subset requested at a token endpoint?", "Should an access-token audience be equated with the whole grant?" ], "supported_claims": [ { "claim": "RFC 8707 allows a token request to select a subset of the resources authorized by the grant. The resulting access token can be restricted to that subset while a refresh token remains associated with the full authorized set. Resource selection must remain within the grant and authorization-server policy; a narrow access token does not prove the underlying grant was reduced.", "reliance": "DOCUMENTED_CAPABILITY_ONLY" } ], "not_demonstrated_claims": [ "Preserve grant-type and AS-policy qualifications; a client request alone does not force universal issuance or narrow the original refresh grant.", "Buyer implementation, live runtime enforcement, settled payment, physical outcome, certification or permission to act are not established.", "No expanded capabilities or licences for existing INDEX executables." ], "public_summary": "RFC 8707 allows a token request to select a subset of the resources authorized by the grant. The resulting access token can be restricted to that subset while a refresh token remains associated with the full authorized set. Resource selection must remain within the grant and authorization-server policy; a narrow access token does not prove the underlying grant was reduced.", "related_record_ids": [], "source_review": { "source_type": "official_external_documentation", "source_title": "IETF RFC 8707", "source_url": "https://www.rfc-editor.org/rfc/rfc8707.txt", "checked_on": "2026-10-25", "candidate_record_id": "VXI-EXT-PROCUREMENT-RESOURCE-TOKEN-NARROWING-01-v1", "candidate_record_sha256": "0e726d0489537fae01390291cab18a24d7b8a94e8f9f08a760beeeaa865901ed", "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": "RFC 8707 allows a token request to select a subset of the resources authorized by the grant. The resulting access token can be restricted to that subset while a refresh token remains associated with the full authorized set. Resource selection must remain within the grant and authorization-server policy; a narrow access token does not prove the underlying grant was reduced.", "required_buyer_context": "Original authorized resource set; Token request resource subset; Issued access and refresh-token policy. 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", "checked_on": "2026-10-25", "claim_to_check": "Can a multi-resource OAuth grant produce a token limited to one selected resource?", "documented_statement": { "status": "documented", "statement": "RFC 8707 allows a token request to select a subset of the resources authorized by the grant. The resulting access token can be restricted to that subset while a refresh token remains associated with the full authorized set. Resource selection must remain within the grant and authorization-server policy; a narrow access token does not prove the underlying grant was reduced.", "source_ids": [ "rfc8707" ] }, "review_inference": { "status": "review_inference", "statement": "Separate the overall grant from the narrower authority of an individual token. This is a documentation-review judgment, not an observed deployment outcome.", "source_ids": [ "rfc8707" ] }, "buyer_evidence_required": [ "Original authorized resource set", "Token request resource subset", "Issued access and refresh-token policy" ], "review_condition": { "status": "varexis_review_policy", "statement": "Refuse buyer-specific assurance from documentation alone. Preserve grant-type and AS-policy qualifications; a client request alone does not force universal issuance or narrow the original refresh grant." }, "unknowns": "The buyer implementation, effective configuration, complete evidence inventory and actual business outcome were not inspected.", "unknown_finding": { "status": "unknown", "statement": "The buyer implementation, effective configuration, complete evidence inventory and actual business outcome were not inspected." }, "evidence_sources": [ { "source_id": "rfc8707", "url": "https://www.rfc-editor.org/rfc/rfc8707.txt", "final_url": "https://www.rfc-editor.org/rfc/rfc8707.txt", "status": 200, "captured_at_utc": "2026-10-25T20:04:28.365Z", "sha256": "3b89844a938b9219571931b664ed4a7b380555a4dda1df4e9445a2f72188e76b", "bytes": 25698, "title": "IETF RFC 8707", "hash_basis": "SHA-256 of unmodified HTTP response body bytes", "rights_review": "Original factual paraphrase of the cited IETF RFC; IETF Trust and contributor rights remain applicable. No RFC text, code component or modified standard is redistributed.", "checked_on": "2026-10-25", "capture_status": 200, "claim_review_completed": true, "reviewed_sections": [ "Section 2", "Section 2.1", "Section 2.2", "Section 3" ], "version_context": "Fixed IETF RFC 8707 publication; later applicable updates and actual implementation conformance require separate review." } ], "observed_deployment": false, "commercial_reliance_boundary": "Documentation review only; the buyer must establish applicability and actual outcomes. INDEX does not inspect or control the deployment.", "paid_value": { "decision_context": "Separate the overall grant from the narrower authority of an individual token.", "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": "Recheck Section 2.2 in IETF RFC 8707 when the source, applicable version, configuration or intended reliance changes. A detected change creates a review candidate, not automatic approval." }, "buyer_relevance": "Separate the overall grant from the narrower authority of an individual token.", "refusal_conditions": [ "Refuse buyer-specific assurance from documentation alone. Preserve grant-type and AS-policy qualifications; a client request alone does not force universal issuance or narrow the original refresh grant." ] }, "niche": { "niche_id": "agent-authority-action-evidence", "label": "Agent Authority & Action Evidence", "classification_id": "governance", "classification_label": "Agent Governance & Policy Boundaries", "topic_id": "governance", "buyer_intent": "Separate the overall grant from the narrower authority of an individual token.", "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" }, "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#resource-token-narrowing", "machine_readable_record": "/varexis-index/records/resource-token-narrowing.json" } } ], "access": { "mode": "exact_http_only", "payment_required": false, "purchase_url": null, "mcp_preview_available": false, "paid_saved_retrieval_available": false, "natural_language_search_qualified": false }, "boundary": "Catalogue additions are available free through the exact HTTP JSON links below. Enhanced natural-language discovery is not yet qualified for these records. They are outside MCP search, MCP preview and paid saved retrieval. No search qualification, executable capability or entitlement is added.", "content_sha256": "56dbd8f4a0bb52e6da3d8566b9685112dd54eccdccd034784c71e641502ea2a4" }