# k1_emergency_stop

Halt every actuator immediately.

Agent View of the PolicyLayer registry record for `k1_emergency_stop`. HTML page: https://policylayer.com/tools/market-execution-execution-market/k1-emergency-stop

## Facts

- Tool: `k1_emergency_stop`
- 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: Execute (High 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": "k1_emergency_stop",
    "arguments": {}
  }
}
```

## Why k1_emergency_stop is rated High

This tool executes a command that triggers real-world mechanical/physical operations (actuators) with immediate and potentially irreversible consequences. While not inherently destructive in data terms, it performs an Execute action by running an external control operation.

From the tool's own definition: "'Halt every actuator immediately' describes triggering an external operation (emergency stop) whose effects depend on system state and argument interpretation. The word 'Halt' indicates immediate execution of a control command affecting real-world actuators."

Risk signals: Bulk/mass operation — affects multiple targets

## Use case

AI agents invoke k1_emergency_stop to trigger actions in Execution Market. 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 Execution Market:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "k1_emergency_stop": {
      "limits": [
        {
          "counter": "k1_emergency_stop_rate",
          "window": "minute",
          "max": 10,
          "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_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
- `robot_sign_voucher_tick` — Financial — https://policylayer.com/tools/market-execution-execution-market/robot-sign-voucher-tick.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