list_accounts

THE RISK

Low Risk

Why list_accounts needs a policy

This tool retrieves financial data (chart of accounts) without creating, modifying, or deleting any records. The verb 'Retrieves' confirms read-only access. The blast radius is minimal as it only exposes existing account structure information.

From the tool's definition Tool name 'list_accounts' and description 'Retrieves the full chart of accounts' indicate a query operation with no side effects.

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

POLICY

How to control list_accounts

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

policy.json

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

list_accounts 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 Xero 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.

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Xero MCP Server tools

Write create_bank_transactions Creates one or more spent or received money transaction. Only use this tool when user has Write create_contacts Creates one or multiple contacts in a Xero organisation. Only use this tool when user has Write update_bank_transaction Updates an existing spent or received money transaction by its Xero bank transaction ID Write update_invoice Updates an existing sales invoice or purchase bill (typically a draft) to change fields li Other authenticate Authenticate with Xero using OAuth2 Read get_balance_sheet Returns a balance sheet for the end of the month of the specified date. It also returns th Read get_bank_transaction Retrieves a single spent or received money transaction by its Xero bank transaction ID Read get_invoice Retrieves a single sales invoice or purchase bill by its Xero invoice ID

All 15 Xero MCP Server tools →

Read tools on other servers

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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 list_accounts

What does the list_accounts tool do? +

Retrieves the full chart of accounts. It is categorised as a Read tool in the Xero MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on list_accounts? +

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

What risk level is list_accounts? +

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

Can I rate-limit list_accounts? +

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

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

list_accounts is provided by the Xero MCP Server MCP server (john-zhang-dev/xero-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Xero MCP Server tool call.

Start from Xero 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 →