ChainHelix for Machines

cleared_buyer

A standing sanctions clearance for your wallet, on file for any seller to read before it takes your job. 2 dollars buys 30 days: the wallet that pays this call is screened now against the OFAC SDN list and the on-chain sanctions oracle, the signed statement is kept on file and renewed every 24 hours for the period, and buyer_clearance (free) returns the current statement to anyone who asks. Call again to extend; the same payment never credits twice. Pay with the wallet to be cleared: a key id cannot be cleared. Price: 2 dollars per call. A ChainHelix API key does not cover this tool.

Input Schema

TableJSON Schema

Name	Required	Description	Default
`network`	No

Output Schema

TableJSON Schema

Name	Required	Description	Default
`note`	No
`error`	No
`active`	No
`onFile`	No
`result`	No
`wallet`	No
`current`	No
`network`	No
`renewals`	No
`daysAdded`	No
`enrolledAt`	No
`validUntil`	No
`howToVerify`	No
`screenedNow`	No
`currentFresh`	No
`nextRenewalAt`	No
`renewEveryHours`	No

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedOct 16, 2026

changedInput schema / x-lexicon / bundleSha256

Previous value: -"670f7504e3de5031beccee25a2d24e4515f68b893295f6d5b0d3a0665498b2c9"New value: +"25cc80db6d8e9eac73d47a50f7ad6333a21f1972d008a8fed0159de8bfb4b519"

Changed2 schema fields changedOct 16, 2026

changedInput schema / x-lexicon / bundleSha256

Previous value: -"e5b4290024a229f2bdf97f8fc6a0079c3fe13b77267f41fdcffeb8b26aa1c41e"New value: +"670f7504e3de5031beccee25a2d24e4515f68b893295f6d5b0d3a0665498b2c9"

changedInput schema / x-lexicon / version

Previous value: -"0.1.0"New value: +"0.2.0"

Changed3 schema fields changedOct 15, 2026

addedInput schema / additionalProperties
```
Added value: +false
```

removedOutput schema / properties / meta

Removed value: -{
-  "additionalProperties": false,
-  "properties": {
-    "contentHash": {
-      "type": "string"
-    },
-    "generated": {
-      "type": "number"
-    },
-    "priceUsd": {
-      "type": "number"
-    },
-    "validUntil": {
-      "type": "number"
-    }
-  },
-  "type": "object"
-}

removedOutput schema / properties / receipt

Removed value: -{
-  "additionalProperties": false,
-  "properties": {
-    "bytes": {
-      "type": "number"
-    },
-    "covers": {
-      "type": "string"
-    },
-    "issuedAt": {
-      "type": "number"
-    },
-    "lookup": {
-      "type": "string"
-    },
-    "network": {
-      "type": [
-        "string",
-        "null"
-      ]
-    },
-    "nonce": {
-      "type": "string"
-    },
-    "seq": {
-      "type": "number"
-    },
-    "settleTx": {
-      "type": [
-        "string",
-        "null"
-      ]
-    },
-    "sha256": {
-      "type": "string"
-    },
-    "tool": {
-      "type": [
-        "string",
-        "null"
-      ]
-    }
-  },
-  "type": "object"
-}

Changed1 schema field changedSep 21, 2026

changedInput schema / x-lexicon / bundleSha256

Previous value: -"a1c2e10fd3177d6b4d59ca78693e8fb36880165cf0f735f680dd86a510411178"New value: +"e5b4290024a229f2bdf97f8fc6a0079c3fe13b77267f41fdcffeb8b26aa1c41e"

Changed1 schema field changedSep 19, 2026

changedInput schema / x-lexicon / bundleSha256

Previous value: -"1eeb782ee15fe69fc80776948e0556fa6b795e210e6305935b2c97b73d955cda"New value: +"a1c2e10fd3177d6b4d59ca78693e8fb36880165cf0f735f680dd86a510411178"

Changed1 schema field changedSep 19, 2026

changedInput schema / x-lexicon / bundleSha256

Previous value: -"c014292cad7497ce9fd68c33345ac32cb42b672c8e77d6c749c26e162cc207e4"New value: +"1eeb782ee15fe69fc80776948e0556fa6b795e210e6305935b2c97b73d955cda"

Changed3 schema fields changedSep 19, 2026

addedInput schema / x-aliases

Added value: +{
+  "network": [
+    "Network"
+  ]
+}

addedInput schema / x-lexicon

Added value: +{
+  "bundleSha256": "c014292cad7497ce9fd68c33345ac32cb42b672c8e77d6c749c26e162cc207e4",
+  "name": "ChainHelix Agentic Lexicon",
+  "resolve": "lexicon_resolve",
+  "spec": "lexicon_spec",
+  "version": "0.1.0"
+}

addedInput schema / x-vocab

Added value: +{
+  "network": "payment.network"
+}

AddedSep 8, 2026

TDQS

A4.5/5.0

Behavior5/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations, the description carries the full behavioral burden and meets it: $2 per 30-day call, the exact screening sources, a signed statement kept on file and renewed every 24 hours, the no-double-credit payment rule, and the payment-identity requirement. This is unusually complete disclosure for a paid mutation tool.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is dense but front-loaded with the core offer (price/period) before mechanics. The final two sentences about paying with the wallet and the API key partially overlap the earlier 'a key id cannot be cleared' clause, costing a little tightness.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

An output schema exists, so return values need not be explained, and the behavioral gaps (price, renewal, screening, payment identity) are covered. The only real omission is any mention of the network parameter, which the description ignores while the schema leaves it undocumented.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

There is one optional parameter, network, with 0% schema description coverage, and the description says nothing about it — no accepted values or how it interacts with the payment. The schema's x-vocab reference to payment.network offers only a hint. A baseline 3 is appropriate for a single low-complexity string that the description leaves entirely to the schema.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description states a specific verb and resource — it issues a standing sanctions clearance for the paying wallet, screened against the OFAC SDN list and an on-chain oracle. It also distinguishes itself from the sibling buyer_clearance by naming that tool's role (free retrieval of the current statement).

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines5/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

It gives explicit when-to-use context (to become clearable), how to extend (call again for another 30 days), and hard constraints (pay with the wallet to be cleared; a key id cannot be cleared; a ChainHelix API key does not cover this tool). It also routes readers to the free buyer_clearance alternative.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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