# place_market_order

A financial tool on the Lighter MCP MCP server.

Agent View of the PolicyLayer registry record for `place_market_order`. HTML page: https://policylayer.com/tools/0xdegenmo-lighter-mcp/place-market-order

## Facts

- Tool: `place_market_order`
- Server: Lighter MCP (`0xdegenmo/lighter-mcp`) — https://policylayer.com/tools/0xdegenmo-lighter-mcp.md
- Homepage: https://github.com/0xDegenMo/lighter-mcp
- Risk category: Financial (Critical risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Approval-gated

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

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

## Why place_market_order is rated Critical

Placing a market order on a perpetual DEX directly commits financial obligations — it executes trades involving real assets/funds on-chain. The server context makes clear this is a live trading platform. Empty description lowers confidence slightly, but the tool name and server context strongly indicate financial transaction execution. Misuse could result in significant financial loss.

From the tool's own definition: "Tool name 'place_market_order' on a server described as a perpetual DEX where users can 'trade Lighter perpetuals natively: place orders, manage positions'"

## Use case

AI agents use place_market_order to commit financial operations through Lighter MCP, usually the final step of a payment, billing, or trading workflow. A call moves real money.

## Recommended policy (PolicyLayer)

Verdict: **Approval-gated**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Lighter MCP:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "place_market_order": {
      "deny_if": [
        {
          "conditions": [],
          "on_deny": "Requires human approval."
        }
      ]
    }
  }
}
```

## Other tools on Lighter MCP (19)

- `cancel_all_orders` — Destructive — https://policylayer.com/tools/0xdegenmo-lighter-mcp/cancel-all-orders.md
- `cancel_order` — Destructive — https://policylayer.com/tools/0xdegenmo-lighter-mcp/cancel-order.md
- `close_position` — Financial — https://policylayer.com/tools/0xdegenmo-lighter-mcp/close-position.md
- `place_limit_order` — Financial — https://policylayer.com/tools/0xdegenmo-lighter-mcp/place-limit-order.md
- `place_stop_loss` — Financial — https://policylayer.com/tools/0xdegenmo-lighter-mcp/place-stop-loss.md
- `place_take_profit` — Financial — https://policylayer.com/tools/0xdegenmo-lighter-mcp/place-take-profit.md
- `get_balance` — Read — https://policylayer.com/tools/0xdegenmo-lighter-mcp/get-balance.md
- `get_candles` — Read — https://policylayer.com/tools/0xdegenmo-lighter-mcp/get-candles.md
- `get_funding_rate` — Read — https://policylayer.com/tools/0xdegenmo-lighter-mcp/get-funding-rate.md
- `get_market` — Read — https://policylayer.com/tools/0xdegenmo-lighter-mcp/get-market.md
- `get_orderbook` — Read — https://policylayer.com/tools/0xdegenmo-lighter-mcp/get-orderbook.md
- `get_position` — Read — https://policylayer.com/tools/0xdegenmo-lighter-mcp/get-position.md
- `get_positions` — Read — https://policylayer.com/tools/0xdegenmo-lighter-mcp/get-positions.md
- `get_signup_info` — Read — https://policylayer.com/tools/0xdegenmo-lighter-mcp/get-signup-info.md
- `get_status` — Read — https://policylayer.com/tools/0xdegenmo-lighter-mcp/get-status.md
- `get_ticker` — Read — https://policylayer.com/tools/0xdegenmo-lighter-mcp/get-ticker.md
- `list_markets` — Read — https://policylayer.com/tools/0xdegenmo-lighter-mcp/list-markets.md
- `how_to_approve_integrator` — Write — https://policylayer.com/tools/0xdegenmo-lighter-mcp/how-to-approve-integrator.md
- `set_leverage` — Write — https://policylayer.com/tools/0xdegenmo-lighter-mcp/set-leverage.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=0xdegenmo-lighter-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/0xdegenmo-lighter-mcp