# lint_mcp_tool_definition

Validate an MCP tool definition against JSON Schema 2020-12 and current naming, output-schema, and annotation rules; returns findings, a conformance score, and a recommended annotation set. Use when a developer wants to check an MCP tool definition before publishing. Renders the interactive AINumbers tool as a widget; inputs are applied via the AIN Bridge and the tool runs client-side (zero PII, zero network).

Agent View of the PolicyLayer registry record for `lint_mcp_tool_definition`. HTML page: https://policylayer.com/tools/postoaklabs-ainumbers-mcp-apps/lint-mcp-tool-definition

## Facts

- Tool: `lint_mcp_tool_definition`
- 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: Read (Low risk)
- Registry record: grade F, identity unverified
- Server auth posture: open
- Server CORS policy: https://ainumbers.co
- Server rate-limited: no
- Parameters: 1
- Recommended policy verdict: Allowed

## Parameters

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `inputs` | object | no | Map of tool input element IDs to values (see manifest input_schema). Applied via AIN Bridge prefill. |

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": "lint_mcp_tool_definition",
    "arguments": {}
  }
}
```

## Why lint_mcp_tool_definition is rated Low

This tool performs static analysis/validation of a tool definition and returns findings and scores. It reads/analyzes input data and produces a report with no side effects, no data mutation, no execution of arbitrary code, and no financial operations. The description explicitly states 'zero PII, zero network' and 'runs client-side', confirming it is a pure read/analysis operation.

From the tool's own definition: "Validate an MCP tool definition against JSON Schema 2020-12 and current naming, output-schema, and annotation rules; returns findings, a conformance score, and a recommended annotation set... zero PII, zero network"

## Use case

AI agents call lint_mcp_tool_definition to retrieve information from Ainumbers Mcp Apps without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

## Recommended policy (PolicyLayer)

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

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "lint_mcp_tool_definition": {}
  }
}
```

## 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