Verified calculation capability

Conformity decision rule Calculation Capability

Binary ILAC G8-style decision on a measured y: simple acceptance (w=0) or guarded acceptance (LSL+w ≤ y ≤ USL−w). The guard-band zone is fail, not conditional. Not JCGM 106 risk, not TUR, and not GB-only. · Engineering · Conformity

Capability ID engineering.conformity.decision_rule · version 1.0.0

Open calculator REST API MCP Evidence Evidence JSON Review policy

Model

Simple

Simple: LSL ≤ y ≤ USL
Guarded: LSL + w ≤ y ≤ USL − w

Inputs / Outputs

Canonical symbols for this capability. Agent schemas remain the contract.

Symbol	Quantity	Unit	Role
`y`	Measured value.	—	input / output
`lsl`	Lower specification limit. Provide lsl, usl, or both.	—	input / output
`usl`	Upper specification limit. Must be greater than lsl when both are set.	—	input / output
`rule`	simple (default) or guarded. Aliases: simple_acceptance, guarded_acceptance.	—	input / output
`w`	Guard-band width when rule=guarded. Provide w or U, not required for simple.	—	input / output
`U`	Already-expanded U used as w when rule=guarded and w is omitted.	—	input
`decision`	—	—	output
`accept_lsl`	—	—	output
`accept_usl`	—	—	output

Assumptions / Validity

Declared scope for this capability. Do not use it outside this domain.

Assumptions

ILAC G8-style binary simple (w=0) or guarded acceptance
Default rule is simple
Guarded w from w or already-expanded U; the band is fail
Not JCGM 106 risk tables, not TUR, and not GB = k·u as a product

Not supported

JCGM 106 risk tables
conditional third outcome
TUR≥4 verdict
GB = k·u as a product
RSS of u_i

Example

One numerical check. The calculator page holds worked steps and FAQ.

y=6 lsl=0 usl=12 rule=simple → pass

Open this example in the calculator

Trust

Review-policy: engine tested — automated tests, sources, version lock, and evidence published. Supplemental to CVP; not Domain Expert Review. See CVP and Review policy.

Tier: Engine tested — catalog token engine_tested
Calculation version: 1.0.0
Evidence tests: 11/11 calculation tests · golden 0/0 · boundary 7/7 · property 4/4
Engine tested: Yes
Source checked: Yes
Supplemental domain review: Not performed
Named expert review: Not performed
Version lock: Supported (409 VERSION_MISMATCH)
Artifact consistency: Build verified · 1.0.0 (workspace artifacts agree)

Production attestation: Embedded snapshot: STALE · Last attested schema matched 1.0.0 snapshot / local build · Semantic contract ✓ · Last attestation PASS · current evidence changed · re-attestation required · Public/cache ✓ · Origin ✓ · Live production status PASS (0 stale; 164 CURRENT) @ 2026-09-16T06:44:24.909Z
Semantic contract: PASS
Evidence attested at: 2026-09-16T06:44:24.203Z
Last production check: 2026-09-16T06:44:24.203Z
Public / cache: PASS
Origin: PASS

Call this capability

Human page, REST, and MCP share the same engine and calculation_version. Build verified hashes workspace artifacts only. After deploy, attest:production GETs canonical URLs twice — the public/cached view an Agent actually hits, and origin — including every /capabilities/{id} HTML page. Public Capability HTML version must match catalog before production attestation passes. Live Trust rows above fetch /.well-known/calculatorx-production-attestation.json and the output schema const. Build hashes: release integrity. That proves currently published page / engine / schema / evidence / MCP agree — not that a historical version is independently immutable. Reference Calculation Standard — Production surface contract 4/4.

Tool id: decision-rule
Engine: decision-rule
REST: POST /api/v1/calc/decision-rule
MCP: execute_calculation with capability_id: "engineering.conformity.decision_rule"
Agent input schema: Canonical (MCP / Agent)
Output schema: JSON Schema (latest)
Versioned input schema: Immutable pin (1.0.0)
Versioned output schema: Immutable pin (1.0.0)

References

Human-readable sources plus CVP reference evidence classes.

Sources

Try with an agent

Inspect this capability via same-origin MCP, then call execute_calculation.

curl -sS -X POST 'https://www.calculatorx.com/mcp' \
  -H 'Content-Type: application/json' \
  -H 'MCP-Protocol-Version: 2026-07-28' \
  -H 'Mcp-Method: tools/call' \
  -H 'Mcp-Name: inspect_capability' \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/call","params":{"name":"inspect_capability","arguments":{"capability_id":"engineering.conformity.decision_rule"}}}'

Inspect the trust tier and required assurance level before execution. Pin calculation_version (1.0.0) when reproducibility matters. Full protocol notes: MCP docs.