accounts_getBalanceTrends

THE RISK

Low Risk

Why accounts_getBalanceTrends needs a policy

This tool retrieves and analyzes historical account balance data to show trends and changes over time. It performs no mutations, does not execute arbitrary operations, and does not move money or create financial obligations. The blast radius of misuse is limited to unauthorized disclosure of financial information, which is a confidentiality concern rather than integrity or availability risk.

From the tool's definition Tool name 'accounts_getBalanceTrends' and description 'Get account balance changes summary (gains/losses)' indicate data retrieval only.

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

POLICY

How to control accounts_getBalanceTrends

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

policy.json

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

accounts_getBalanceTrends 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 MonarchMoney MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

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EXPLORE

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
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FAQ

Questions about accounts_getBalanceTrends

What does the accounts_getBalanceTrends tool do? +

Get account balance changes summary (gains/losses). It is categorised as a Read tool in the MonarchMoney MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on accounts_getBalanceTrends? +

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

What risk level is accounts_getBalanceTrends? +

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

Can I rate-limit accounts_getBalanceTrends? +

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

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

accounts_getBalanceTrends is provided by the MonarchMoney MCP Server MCP server (keithah/monarchmoney-ts-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every MonarchMoney MCP Server tool call.

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

CHECK YOUR STACK →