mt5_order_modify · MT5 MCP Server MCP: Risk & Policy

WHAT IT DOES

What mt5_order_modify does on MT5 MCP Server

AI agents use mt5_order_modify to create or update resources in MT5 MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your MT5 MCP Server environment.

WHY IT NEEDS A POLICY

Why mt5_order_modify needs a policy

This tool modifies existing pending orders by changing price levels and risk parameters (stop-loss and take-profit), which is a reversible write operation. It does not delete orders (would be Destructive) or execute new trades (would be Execute), but rather adjusts parameters of existing orders.

From the tool's definition Tool name 'mt5_order_modify' combined with description '待機注文の価格 / SL / TP を変更する' (Modify pending order price / stop-loss / take-profit). The description explicitly states modification of order parameters.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

mt5_order_modify Rate-limited

mt5_order_modify stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "mt5_order_modify": {
      "limits": [
        {
          "counter": "mt5_order_modify_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches MT5 MCP Server, so you can run agents against it safely.

FAQ

Questions about mt5_order_modify

What does the mt5_order_modify tool do? +

待機注文の価格 / SL / TP を変更する。. It is categorised as a Write tool in the MT5 MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on mt5_order_modify? +

Register the MT5 MCP Server MCP server in PolicyLayer and add a rule for mt5_order_modify: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches MT5 MCP Server. Nothing to install.

What risk level is mt5_order_modify? +

mt5_order_modify is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit mt5_order_modify? +

Yes. Add a rate_limit block to the mt5_order_modify rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block mt5_order_modify completely? +

Set action: deny in the PolicyLayer policy for mt5_order_modify. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides mt5_order_modify? +

mt5_order_modify is provided by the MT5 MCP Server MCP server (junmt/mt5-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.