list_price_tables

THE RISK

Low Risk

Why list_price_tables needs a policy

This is a read-only operation that retrieves information about price tables/trade policies from the AFIP system. It has no side effects, does not modify data, and poses minimal risk. The verb 'list' is characteristic of Read operations. While price table information could theoretically be sensitive business data, the tool itself simply retrieves existing configuration without altering it.

From the tool's definition The tool name 'list_price_tables' and description 'List all configured price tables (trade policies)' indicate a retrieval operation that queries existing data without modification.

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

POLICY

How to control list_price_tables

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_price_tables:

policy.json

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

list_price_tables 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

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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_price_tables

What does the list_price_tables tool do? +

List all configured price tables (trade policies). 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_price_tables? +

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

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

Can I rate-limit list_price_tables? +

Yes. Add a rate_limit block to the list_price_tables 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_price_tables completely? +

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

list_price_tables 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 →