getTopCounterparties

THE RISK

Low Risk

Why getTopCounterparties needs a policy

This tool retrieves and queries financial transaction metadata (counterparty information derived from past transactions). It has no side effects, does not modify data, does not execute operations, does not delete anything, and does not move money.

From the tool's definition Tool name is 'getTopCounterparties' and description states 'Get a list of unique person counterparties based on recent transactions' - uses 'Get' verb and retrieves historical transaction data without modification.

Documented attack patterns abuse exactly the kind of access getTopCounterparties gives an agent:

POLICY

How to control getTopCounterparties

PolicyLayer is an MCP gateway — it sits between your AI agents and Bunq MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for getTopCounterparties:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "getTopCounterparties": {}
  }
}

getTopCounterparties is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register Bunq MCP — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

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All 8 Bunq MCP tools →

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about getTopCounterparties

What does the getTopCounterparties tool do? +

Get a list of unique person counterparties based on recent transactions. It is categorised as a Read tool in the Bunq MCP MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on getTopCounterparties? +

Register the Bunq MCP server in PolicyLayer and add a rule for getTopCounterparties: 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 Bunq MCP. Nothing to install.

What risk level is getTopCounterparties? +

getTopCounterparties is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit getTopCounterparties? +

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

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

getTopCounterparties is provided by the Bunq MCP server (wilcokruijer/bunq-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Bunq MCP tool call.

Start from Bunq MCP, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →