list_sales

THE RISK

Low Risk

Why list_sales needs a policy

This tool retrieves or queries sales data from an accounting system (Conta Azul) with no side effects, permanent changes, or external operations triggered. It matches the Read category definition: 'retrieves or queries data; no side effects (search, list, get, fetch).' Severity is low because misuse would only expose financial data visibility, not cause destructive, financial, or operational harm.

From the tool's definition Tool name 'list_sales' with verb 'List' indicates retrieval/query operation. Description states 'List sales in Conta Azul' which retrieves sales data without modification.

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

POLICY

How to control list_sales

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

policy.json

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

list_sales 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 Mcp Afip — 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

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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_sales

What does the list_sales tool do? +

List sales in Conta Azul. It is categorised as a Read tool in the Mcp Afip MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on list_sales? +

Register the Mcp Afip MCP server in PolicyLayer and add a rule for list_sales: 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 Mcp Afip. Nothing to install.

What risk level is list_sales? +

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

Can I rate-limit list_sales? +

Yes. Add a rate_limit block to the list_sales 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_sales completely? +

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

list_sales is provided by the Mcp Afip MCP server (codespar/mcp-dev-latam). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Mcp Afip tool call.

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

CHECK YOUR STACK →