# sync_ea_from_file

Sync an existing EA file to MetaTrader 4

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

## Facts

- Tool: `sync_ea_from_file`
- 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: Write (Medium 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": "sync_ea_from_file",
    "arguments": {}
  }
}
```

## Why sync_ea_from_file is rated Medium

This tool writes/uploads an Expert Advisor file to the MetaTrader 4 platform. It modifies the EA files on the trading system, which could enable automated trading strategies to be deployed or replaced. While it doesn't directly execute trades or move money itself, deploying a malicious or faulty EA could indirectly lead to financial harm.

From the tool's own definition: "Sync an existing EA file to MetaTrader 4"

## Use case

AI agents use sync_ea_from_file to create or update resources in MCP MetaTrader 4 Server, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your MCP MetaTrader 4 Server environment.

## 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": {
    "sync_ea_from_file": {
      "limits": [
        {
          "counter": "sync_ea_from_file_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}
```

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

- `compile_ea` — Execute — https://policylayer.com/tools/8nite-metatrader-4-mcp/compile-ea.md
- `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

## 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