{
  "tool_id": "art-628-declarative-decision-tree-evaluator",
  "tool_version": "1.0.0",
  "display_name": "Declarative Decision-Tree Evaluator",
  "mcp_name": "evaluate_decision_tree",
  "mandate_type": "compliance_mandate",
  "wave": 100,
  "gpu": false,
  "url": "https://ainumbers.co/chaingraph/art-628-declarative-decision-tree-evaluator.html",
  "description": "Evaluates a caller-supplied, hash-pinned decision tree against caller-supplied facts entirely offline, client-side. The tree is inert data -- one audited interpreter walks it over a closed operator set (eq, in, lt, lte, gt, gte, between, all_of, any_of, none_of), never eval and never a function-valued criterion. Every node in the tree, internal criteria included and not leaves only, must carry a citation to a pinned clause snapshot; a tree with any uncited node is rejected by the loader. Independently recomputes the tree's own tree_digest from its bytes and refuses to evaluate on a mismatch -- never trusting the declared digest as an oracle for itself. Ships with a demonstrator tree exercising the Reg D Rule 501(a) entity-type accredited-investor category test (17 CFR 230.501(a)(1), (2), (3), (8), (9)), enumerated exhaustively over its 5 declared boolean fields (32 combinations, 0 unexplained results) because every criterion in that tree is a bounded enum. Never a full accredited-investor determination: the natural-person and numeric-threshold prongs of Rule 501(a) are explicitly out of this demonstrator's scope.",
  "input_schema_ref": "tools/628-declarative-decision-tree-evaluator.html#manifest",
  "consumes": [],
  "feeds": [],
  "status": "live",
  "conformance_fixtures": true,
  "compute_capability": "server",
  "compute_images": [
    { "system": "sha256-source", "image_id": "sha256:23fafefb1f2949dbb40b7bfb74f121ebae0388f743e72666aba5713731f80239", "valid_from": "2026-08-16" }
  ],
  "export_capability": ["json"],
  "compute_proof_ready": "deferred",
  "deferred_reason": "New gpu:false node, art-628, staged 2026-08-16 (ACCT-DTREE-K-1). No GPU proving attempted this session -- GPU-CYCLE-PREFLIGHT-1's exec-cycle check could not be run (runq-cpu unavailable in this environment, same precedent as art-626/ACCT-AMORT-K-1's cycle_preflight: PENDING). Ratchet-visible deferral per the Sec.18 steady-state rule (RIDER-KERNEL.md), never a silent claim of proof. Proving is a follow-on, gated by SIDEBYSIDE-BEFORE-PROVE-1 (SO #39) since this is a standards-implementing node (17 CFR 230.501(a)).",
  "standards_basis": "implements_standard",
  "cited_clause_digest": [
    { "digest": "sha256:7281c8642064555f7f1375fdcf4a89ed513fa438cd62b358c865c33ce26b901e", "source_url": "https://www.law.cornell.edu/cfr/text/17/230.501", "retrieved_at": "2026-08-16", "clause_path": "(a)", "scheme": "cfr", "id": "17 CFR 230.501(a)" },
    { "digest": "sha256:ee3890d78e04a0c99b61ebd7536de2b9a12495f7571aa1d91d455d5abfa497f6", "source_url": "https://www.law.cornell.edu/cfr/text/17/230.501", "retrieved_at": "2026-08-16", "clause_path": "(a)(1)", "scheme": "cfr", "id": "17 CFR 230.501(a)(1)" },
    { "digest": "sha256:393146815712bf87aaab3508cc3b896ecd682e9a50c448d94d66ca7382117d79", "source_url": "https://www.law.cornell.edu/cfr/text/17/230.501", "retrieved_at": "2026-08-16", "clause_path": "(a)(2)", "scheme": "cfr", "id": "17 CFR 230.501(a)(2)" },
    { "digest": "sha256:78c27bf761a74f2c527196a7ea03d4345c5b97d04bebf341e76e6e1858a6b955", "source_url": "https://www.law.cornell.edu/cfr/text/17/230.501", "retrieved_at": "2026-08-16", "clause_path": "(a)(3)", "scheme": "cfr", "id": "17 CFR 230.501(a)(3)" },
    { "digest": "sha256:19b6da2ee9930ed5e98d94b68cc271fedb90f74b895869aa4ec78f4fa1c3d84c", "source_url": "https://www.law.cornell.edu/cfr/text/17/230.501", "retrieved_at": "2026-08-16", "clause_path": "(a)(8)", "scheme": "cfr", "id": "17 CFR 230.501(a)(8)" },
    { "digest": "sha256:033e47ce5f91bc0e2b22252bebfdfd7018622634e2eb9b0d04e875d1c61596bd", "source_url": "https://www.law.cornell.edu/cfr/text/17/230.501", "retrieved_at": "2026-08-16", "clause_path": "(a)(9)", "scheme": "cfr", "id": "17 CFR 230.501(a)(9)" }
  ]
}