query_allowlist

THE RISK

Low Risk

Why query_allowlist needs a policy

This tool performs a lookup/check operation against an allowlist, which is a data retrieval action with no side effects. It does not create, modify, delete, or execute any operations. The allowlist check is a straightforward read operation used for validation purposes in the context of AFIP's electronic invoicing system.

From the tool's definition Tool name 'query_allowlist' and description 'Check whether a value is currently on the Konduto allowlist' indicate a read-only query operation that retrieves status information without modifying any data.

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

POLICY

How to control query_allowlist

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 query_allowlist:

policy.json

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

query_allowlist 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.

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EXPLORE

Related tools and policies

More Mcp Afip 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 query_allowlist

What does the query_allowlist tool do? +

Check whether a value is currently on the Konduto allowlist. Konduto. 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 query_allowlist? +

Register the Mcp Afip MCP server in PolicyLayer and add a rule for query_allowlist: 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 query_allowlist? +

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

Can I rate-limit query_allowlist? +

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

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

query_allowlist 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 →