rename_account · Finance App MCP: Risk & Policy

WHAT IT DOES

What rename_account does on Finance App

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

WHY IT NEEDS A POLICY

Why rename_account needs a policy

This tool modifies account data (the account name/label) but the change is reversible — the account can be renamed again to any other value. It falls squarely in Write (creates or modifies data reversibly). Severity is medium because renaming an account has limited direct blast radius; an erroneous rename causes confusion and audit trails but is easily undone, unlike destructive or financial operations.

From the tool's definition Tool performs 'Rename an existing account by id' — a reversible modification of account metadata. Does not delete, execute code, or move money.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

rename_account Rate-limited

rename_account 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": {
    "rename_account": {
      "limits": [
        {
          "counter": "rename_account_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 Finance App, so you can run agents against it safely.

FAQ

Questions about rename_account

What does the rename_account tool do? +

Rename an existing account by id. It is categorised as a Write tool in the Finance App MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on rename_account? +

Register the Finance App MCP server in PolicyLayer and add a rule for rename_account: 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 Finance App. Nothing to install.

What risk level is rename_account? +

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

Can I rate-limit rename_account? +

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

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

rename_account is provided by the Finance App MCP server (youssefaltai/finance-app). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.