# run_chain

Executes every step of a named chain (list names with find_chain / build_workflow_links) and returns ONE composite artifact whose execution_hash anchors all step outputs. compute:"server"/"auto" (default) runs each kernel-backed step server-side, threading step N's execution_hash into step N+1's parent_hashes; compute:"browser" returns a zero-egress delegation bundle (composer URL + ordered deep-links) to run client-side instead — no data leaves the agent. Supply inputs as a map of step tool_id -> policy_parameters (field names per node manifest / build_chaingraph); a step whose kernel needs inputs you omit is reported per-step (status "input_required"), never failed silently. Steps that are browser-only (gpu:true or no registered kernel) are listed for browser delegation. Deterministic, zero PII, zero payload logging. Verify the result with verify_execution_hash. Response includes a ledger_url fragment link for human verification at ledger.ainumbers.co.

Agent View of the PolicyLayer registry record for `run_chain`. HTML page: https://policylayer.com/tools/postoaklabs-ainumbers-mcp-apps/run-chain

## Facts

- Tool: `run_chain`
- 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: 5 (1 required)
- Recommended policy verdict: Rate-limited

## Parameters

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `chain` | string | yes | Chain name, e.g. "agent-commerce-conformance". List names with find_chain or build_workflow_links. |
| `inputs` | object | no | Map of step tool_id -> policy_parameters overrides. Omitted steps run with {} (kernels needing required fields are reported, not failed silently). |
| `compute` | string | no | "auto"/"server" (default) runs kernel-backed steps server-side; "browser" returns a zero-egress delegation bundle to run client-side. |
| `mandate` | object | no | Optional §22 Work Mandate artifact. When supplied: §16 signature is verified and validity window is checked (unsigned/bad-sig/expired returns a structured error |
| `escalation_transport` | string | no | How an OCG §22.8 escalation is delivered. "resolve_handle" (DEFAULT) never blocks: the run COMPLETES with status "escalated" plus the open record, its record_ha |

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": "run_chain",
    "arguments": {
      "chain": "<chain>"
    }
  }
}
```

## Why run_chain is rated High

The tool triggers execution of multi-step workflows with server-side computation (compute:"server" option), threading execution state between steps. While described as part of a fintech system with read-only characteristics at the server level, run_chain itself performs active execution of chained operations whose effects depend on the chain configuration and input parameters supplied.

From the tool's own definition: "Tool description states 'Executes every step of a named chain' and 'runs each kernel-backed step server-side', indicating execution of complex operations with server-side computation and state threading across multiple steps."

Risk signals: Bulk/mass operation — affects multiple targets

## Use case

AI agents invoke run_chain 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": {
    "run_chain": {
      "limits": [
        {
          "counter": "run_chain_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