create_deal · freee MCP Server MCP: Risk & Policy

WHAT IT DOES

What create_deal does on freee MCP Server

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

WHY IT NEEDS A POLICY

Why create_deal needs a policy

Creating transactions in accounting software modifies financial records reversibly but represents a significant business operation. This is Write rather than Financial because it records transactions without directly moving money (Financial applies to payments, refunds, trades).

From the tool's definition Tool name 'create_deal' and description 'freee取引を作成' (create freee transaction) explicitly performs a creation operation. Server context indicates this interacts with accounting software where transactions represent financial records.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_deal Rate-limited

create_deal 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": {
    "create_deal": {
      "limits": [
        {
          "counter": "create_deal_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 freee MCP Server, so you can run agents against it safely.

FAQ

Questions about create_deal

What does the create_deal tool do? +

freee取引を作成. It is categorised as a Write tool in the freee 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 create_deal? +

Register the freee MCP Server MCP server in PolicyLayer and add a rule for create_deal: 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 freee MCP Server. Nothing to install.

What risk level is create_deal? +

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

Can I rate-limit create_deal? +

Yes. Add a rate_limit block to the create_deal 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 create_deal completely? +

Set action: deny in the PolicyLayer policy for create_deal. 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 create_deal? +

create_deal is provided by the freee MCP Server MCP server (unson-llc/freee-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.