# emit_chaingraph_artifact

Makes ChainGraph tools agent-callable (ChainGraph Standard v0.1 §3.1). Mode 1 — supply pre_computed_artifact (exported from the browser tool): validates §4 schema fields, recomputes execution_hash via SHA-256 over canonical {policy_parameters, output_payload}, returns verified structuredContent. Mode 2 — supply tool_id + policy_parameters: returns an artifact template envelope and browser prefill URL so an agent can hand the user a pre-filled link; GPU sims always delegate to the browser per §9.2. Mode 3 — supply tool_id only: returns node metadata and artifact schema scaffold. Mode 4 (Compute Binding, v0.4) — supply tool_id + policy_parameters + compute:"server" (or compute:"auto" for gpu:false nodes): runs the registered kernel server-side and returns a verified v0.4 artifact with execution_hash + output_payload in one round-trip. No browser required. gpu:true nodes always delegate to browser. readOnlyHint: true. Zero PII, zero payload logging. Pair with verify_execution_hash (independent hash verification) and build_chaingraph (DAG wiring).

Agent View of the PolicyLayer registry record for `emit_chaingraph_artifact`. HTML page: https://policylayer.com/tools/postoaklabs-ainumbers-mcp-apps/emit-chaingraph-artifact

## Facts

- Tool: `emit_chaingraph_artifact`
- Server: Ainumbers Mcp Apps (`postoaklabs/ainumbers-mcp-apps`) — https://policylayer.com/tools/postoaklabs-ainumbers-mcp-apps.md
- Homepage: https://github.com/PostOakLabs/ainumbers-mcp-apps
- Risk category: Execute (High risk)
- Registry record: grade F, identity unverified
- Server auth posture: open
- Server CORS policy: https://ainumbers.co
- Server rate-limited: no
- Parameters: 6
- Recommended policy verdict: Rate-limited

## Parameters

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `compute` | string | no | Compute mode (v0.4 Compute Binding). "auto" = server for gpu:false nodes (default); "server" = force server-side; "browser" = always return browser delegation U |
| `tool_id` | string | no | ChainGraph node tool_id (e.g. "art-01-ap2-mandate-chain-validator"). Looked up in chaingraph.json nodes. Required unless pre_computed_artifact is supplied. |
| `parent_hashes` | array | no | execution_hash values from upstream ChainGraph artifacts this call chains from. Placed into artifact.chain.parent_hashes (ChainGraph Standard v0.1 §5 chain bloc |
| `parent_tool_ids` | array | no | tool_ids corresponding to parent_hashes, in the same order. |
| `policy_parameters` | object | no | Input parameters for the tool (mirrors the tool's Policy Mandate input fields). Used for Mode 2 browser prefill and Mode 4 server-side compute. |
| `pre_computed_artifact` | object | no | A full ChainGraph artifact envelope previously exported from the browser tool via "Export Policy Mandate". When supplied, the worker validates §4 required field |

Parameters from the server's own tool schema.

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "emit_chaingraph_artifact",
    "arguments": {}
  }
}
```

## Why emit_chaingraph_artifact is rated High

This tool executes computational operations (hash computation, schema validation, artifact generation, browser delegation) and triggers external operations depending on supplied arguments. It spans Write (producing artifacts/envelopes) and Execute (running SHA-256 computations, delegating GPU sims, generating prefill URLs for external browser actions). Per the severity rules, Execute takes precedence over Write.

From the tool's own definition: "'Makes ChainGraph tools agent-callable', 'recomputes execution_hash via SHA-256 over canonical {policy_parameters, output_payload}', 'returns verified structuredContent', 'artifact template envelope', 'GPU sims always delegate to the browser'"

## Use case

AI agents invoke emit_chaingraph_artifact to trigger actions in Ainumbers Mcp Apps. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call: builds kicked off, notifications sent, workflows started.

## Recommended policy (PolicyLayer)

Verdict: **Rate-limited**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Ainumbers Mcp Apps:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "emit_chaingraph_artifact": {
      "limits": [
        {
          "counter": "emit_chaingraph_artifact_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}
```

## Other tools on Ainumbers Mcp Apps (687)

- `agentic_mandate_sandbox` — Execute — https://policylayer.com/tools/postoaklabs-ainumbers-mcp-apps/agentic-mandate-sandbox.md
- `allocate_ihb_interest` — Execute — https://policylayer.com/tools/postoaklabs-ainumbers-mcp-apps/allocate-ihb-interest.md
- `amortize_asc606_commissions` — Execute — https://policylayer.com/tools/postoaklabs-ainumbers-mcp-apps/amortize-asc606-commissions.md
- `anchor_document_integrity` — Execute — https://policylayer.com/tools/postoaklabs-ainumbers-mcp-apps/anchor-document-integrity.md
- `apply_climate_scenario` — Execute — https://policylayer.com/tools/postoaklabs-ainumbers-mcp-apps/apply-climate-scenario.md
- `assemble_aiuc1_evidence_pack` — Execute — https://policylayer.com/tools/postoaklabs-ainumbers-mcp-apps/assemble-aiuc1-evidence-pack.md
- `assemble_ocg_evidence_bundle` — Execute — https://policylayer.com/tools/postoaklabs-ainumbers-mcp-apps/assemble-ocg-evidence-bundle.md
- `attest_bulk_disbursement_integrity` — Execute — https://policylayer.com/tools/postoaklabs-ainumbers-mcp-apps/attest-bulk-disbursement-integrity.md
- `attest_calc_agent_independence` — Execute — https://policylayer.com/tools/postoaklabs-ainumbers-mcp-apps/attest-calc-agent-independence.md
- `attest_daily_reconciliation` — Execute — https://policylayer.com/tools/postoaklabs-ainumbers-mcp-apps/attest-daily-reconciliation.md
- `attest_margin_call_lifecycle` — Execute — https://policylayer.com/tools/postoaklabs-ainumbers-mcp-apps/attest-margin-call-lifecycle.md
- `bind_attested_subject` — Execute — https://policylayer.com/tools/postoaklabs-ainumbers-mcp-apps/bind-attested-subject.md
- `build_226j_response_evidence_pack` — Execute — https://policylayer.com/tools/postoaklabs-ainumbers-mcp-apps/build-226j-response-evidence-pack.md
- `build_agent_test_evidence` — Execute — https://policylayer.com/tools/postoaklabs-ainumbers-mcp-apps/build-agent-test-evidence.md
- `build_agent_traffic_policy` — Execute — https://policylayer.com/tools/postoaklabs-ainumbers-mcp-apps/build-agent-traffic-policy.md
- `build_ai_conformity_pack` — Execute — https://policylayer.com/tools/postoaklabs-ainumbers-mcp-apps/build-ai-conformity-pack.md
- `build_ai_workpaper_record` — Execute — https://policylayer.com/tools/postoaklabs-ainumbers-mcp-apps/build-ai-workpaper-record.md
- `build_allocation_decision_receipt` — Execute — https://policylayer.com/tools/postoaklabs-ainumbers-mcp-apps/build-allocation-decision-receipt.md
- `build_amortization_schedule` — Execute — https://policylayer.com/tools/postoaklabs-ainumbers-mcp-apps/build-amortization-schedule.md
- `build_ap2_cartmandate_hashchain` — Execute — https://policylayer.com/tools/postoaklabs-ainumbers-mcp-apps/build-ap2-cartmandate-hashchain.md
- `build_cbcr_report` — Execute — https://policylayer.com/tools/postoaklabs-ainumbers-mcp-apps/build-cbcr-report.md
- `build_chaingraph` — Execute — https://policylayer.com/tools/postoaklabs-ainumbers-mcp-apps/build-chaingraph.md
- `build_claim_dispute_bundle` — Execute — https://policylayer.com/tools/postoaklabs-ainumbers-mcp-apps/build-claim-dispute-bundle.md
- `build_conditional_relief_collateral_receipt` — Execute — https://policylayer.com/tools/postoaklabs-ainumbers-mcp-apps/build-conditional-relief-collateral-receipt.md
- `build_conversion_receipt` — Execute — https://policylayer.com/tools/postoaklabs-ainumbers-mcp-apps/build-conversion-receipt.md
- `build_digest_manifest` — Execute — https://policylayer.com/tools/postoaklabs-ainumbers-mcp-apps/build-digest-manifest.md
- `build_disclosure_manifest` — Execute — https://policylayer.com/tools/postoaklabs-ainumbers-mcp-apps/build-disclosure-manifest.md
- `build_dora_roi_register` — Execute — https://policylayer.com/tools/postoaklabs-ainumbers-mcp-apps/build-dora-roi-register.md
- `build_dual_control_certification` — Execute — https://policylayer.com/tools/postoaklabs-ainumbers-mcp-apps/build-dual-control-certification.md
- `build_etr_possession_chain` — Execute — https://policylayer.com/tools/postoaklabs-ainumbers-mcp-apps/build-etr-possession-chain.md
- …and 657 more: https://policylayer.com/tools/postoaklabs-ainumbers-mcp-apps.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

---

Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=postoaklabs-ainumbers-mcp-apps · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/postoaklabs-ainumbers-mcp-apps