# compile_ea

Compile an EA on MetaTrader 4 and get compilation results

Agent View of the PolicyLayer registry record for `compile_ea`. HTML page: https://policylayer.com/tools/8nite-metatrader-4-mcp/compile-ea

## Facts

- Tool: `compile_ea`
- Server: MCP MetaTrader 4 Server (`8nite/metatrader-4-mcp`) — https://policylayer.com/tools/8nite-metatrader-4-mcp.md
- Homepage: https://github.com/8nite/metatrader-4-mcp
- Risk category: Execute (High risk)
- Registry record: grade F, identity unverified
- 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": "compile_ea",
    "arguments": {}
  }
}
```

## Why compile_ea is rated High

Compilation is an Execute action because it triggers external code processing and transformation. While compilation itself doesn't directly trade, it prepares executable code that will run within MetaTrader 4. A malicious actor could compile malicious Expert Advisors designed to steal credentials, manipulate trades, or exfiltrate account data.

From the tool's own definition: "Tool name 'compile_ea' and description 'Compile an EA on MetaTrader 4' indicates execution of code compilation."

## Use case

AI agents invoke compile_ea to trigger actions in MCP MetaTrader 4 Server. 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 MCP MetaTrader 4 Server:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "compile_ea": {
      "limits": [
        {
          "counter": "compile_ea_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}
```

## Other tools on MCP MetaTrader 4 Server (13)

- `run_backtest` — Execute — https://policylayer.com/tools/8nite-metatrader-4-mcp/run-backtest.md
- `close_position` — Financial — https://policylayer.com/tools/8nite-metatrader-4-mcp/close-position.md
- `place_order` — Financial — https://policylayer.com/tools/8nite-metatrader-4-mcp/place-order.md
- `get_account_info` — Read — https://policylayer.com/tools/8nite-metatrader-4-mcp/get-account-info.md
- `get_backtest_results` — Read — https://policylayer.com/tools/8nite-metatrader-4-mcp/get-backtest-results.md
- `get_backtest_status` — Read — https://policylayer.com/tools/8nite-metatrader-4-mcp/get-backtest-status.md
- `get_history` — Read — https://policylayer.com/tools/8nite-metatrader-4-mcp/get-history.md
- `get_market_data` — Read — https://policylayer.com/tools/8nite-metatrader-4-mcp/get-market-data.md
- `get_positions` — Read — https://policylayer.com/tools/8nite-metatrader-4-mcp/get-positions.md
- `list_experts` — Read — https://policylayer.com/tools/8nite-metatrader-4-mcp/list-experts.md
- `list_local_eas` — Read — https://policylayer.com/tools/8nite-metatrader-4-mcp/list-local-eas.md
- `sync_ea` — Write — https://policylayer.com/tools/8nite-metatrader-4-mcp/sync-ea.md
- `sync_ea_from_file` — Write — https://policylayer.com/tools/8nite-metatrader-4-mcp/sync-ea-from-file.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=8nite-metatrader-4-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/8nite-metatrader-4-mcp