# em_submit_evidence

A write tool on the Execution Market MCP server.

Agent View of the PolicyLayer registry record for `em_submit_evidence`. HTML page: https://policylayer.com/tools/market-execution-execution-market/em-submit-evidence

## Facts

- Tool: `em_submit_evidence`
- Server: Execution Market (`https://mcp.execution.market/mcp/`) — https://policylayer.com/tools/market-execution-execution-market.md
- Homepage: https://github.com/UltravioletaDAO/execution-market
- Risk category: Write (Medium risk)
- Registry record: grade D, identity unverified
- Server auth posture: gated
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Rate-limited

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

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

## Why em_submit_evidence is rated Medium

This tool creates/modifies state by recording evidence submissions tied to task completions and financial outcomes (USDC bounty settlements). It is Write rather than Execute because it submits data rather than runs arbitrary code. It is high severity because incorrect or malicious evidence submission could trigger unwarranted payments or disputes in a financial system.

From the tool's own definition: "Tool name em_submit_evidence suggests submission of evidence (likely proofs of work completion for bounty tasks); empty description limits certainty. Context shows gasless USDC payments via x402 and task acceptance/approval workflow."

## Use case

AI agents use em_submit_evidence to create or update resources in Execution Market, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Execution Market environment.

## Recommended policy (PolicyLayer)

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

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "em_submit_evidence": {
      "limits": [
        {
          "counter": "em_submit_evidence_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}
```

## Other tools on Execution Market (80)

- `em_cancel_task` — Destructive — https://policylayer.com/tools/market-execution-execution-market/em-cancel-task.md
- `k1_emergency_stop` — Execute — https://policylayer.com/tools/market-execution-execution-market/k1-emergency-stop.md
- `k1_grip` — Execute — https://policylayer.com/tools/market-execution-execution-market/k1-grip.md
- `k1_pick` — Execute — https://policylayer.com/tools/market-execution-execution-market/k1-pick.md
- `k1_place` — Execute — https://policylayer.com/tools/market-execution-execution-market/k1-place.md
- `k1_sit` — Execute — https://policylayer.com/tools/market-execution-execution-market/k1-sit.md
- `k1_stand` — Execute — https://policylayer.com/tools/market-execution-execution-market/k1-stand.md
- `k1_walk_to` — Execute — https://policylayer.com/tools/market-execution-execution-market/k1-walk-to.md
- `ows_sign_eip191` — Execute — https://policylayer.com/tools/market-execution-execution-market/ows-sign-eip191.md
- `ows_sign_erc8128_request` — Execute — https://policylayer.com/tools/market-execution-execution-market/ows-sign-erc8128-request.md
- `ows_sign_message` — Execute — https://policylayer.com/tools/market-execution-execution-market/ows-sign-message.md
- `em_accept_agent_task` — Financial — https://policylayer.com/tools/market-execution-execution-market/em-accept-agent-task.md
- `em_approve_submission` — Financial — https://policylayer.com/tools/market-execution-execution-market/em-approve-submission.md
- `em_assign_task` — Financial — https://policylayer.com/tools/market-execution-execution-market/em-assign-task.md
- `em_claim_task` — Financial — https://policylayer.com/tools/market-execution-execution-market/em-claim-task.md
- `em_create_task` — Financial — https://policylayer.com/tools/market-execution-execution-market/em-create-task.md
- `em_escrow_authorize` — Financial — https://policylayer.com/tools/market-execution-execution-market/em-escrow-authorize.md
- `em_escrow_charge` — Financial — https://policylayer.com/tools/market-execution-execution-market/em-escrow-charge.md
- `em_escrow_dispute` — Financial — https://policylayer.com/tools/market-execution-execution-market/em-escrow-dispute.md
- `em_escrow_partial_release` — Financial — https://policylayer.com/tools/market-execution-execution-market/em-escrow-partial-release.md
- `em_escrow_refund` — Financial — https://policylayer.com/tools/market-execution-execution-market/em-escrow-refund.md
- `em_escrow_release` — Financial — https://policylayer.com/tools/market-execution-execution-market/em-escrow-release.md
- `em_get_payment_info` — Financial — https://policylayer.com/tools/market-execution-execution-market/em-get-payment-info.md
- `em_publish_task` — Financial — https://policylayer.com/tools/market-execution-execution-market/em-publish-task.md
- `em_resolve_dispute` — Financial — https://policylayer.com/tools/market-execution-execution-market/em-resolve-dispute.md
- `em_withdraw_earnings` — Financial — https://policylayer.com/tools/market-execution-execution-market/em-withdraw-earnings.md
- `moonpay_sign_onramp_url` — Financial — https://policylayer.com/tools/market-execution-execution-market/moonpay-sign-onramp-url.md
- `ows_sign_eip3009` — Financial — https://policylayer.com/tools/market-execution-execution-market/ows-sign-eip3009.md
- `robot_close_payshell_session` — Financial — https://policylayer.com/tools/market-execution-execution-market/robot-close-payshell-session.md
- `robot_open_payshell_session` — Financial — https://policylayer.com/tools/market-execution-execution-market/robot-open-payshell-session.md
- …and 50 more: https://policylayer.com/tools/market-execution-execution-market.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=market-execution-execution-market · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/market-execution-execution-market