list_price_lists

THE RISK

Low Risk

Why list_price_lists needs a policy

This tool retrieves or lists existing price list configurations without creating, modifying, deleting, or executing external operations. It is a standard read operation with minimal blast radius if misused by an AI agent—at worst, an attacker gains visibility into pricing data, which is a low-severity information disclosure.

From the tool's definition Tool name and description indicate a query operation: 'List price lists' with no modification verbs. The description specifies retrieval from Tiny ERP without side effects.

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

POLICY

How to control list_price_lists

PolicyLayer is an MCP gateway — it sits between your AI agents and Mcp Ap2, and nothing reaches the server without passing your rules. This is the rule we recommend for list_price_lists:

policy.json

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

list_price_lists 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 Ap2 — 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_price_lists

What does the list_price_lists tool do? +

List price lists (listas de preços) configured in Tiny ERP. It is categorised as a Read tool in the Mcp Ap2 MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on list_price_lists? +

Register the Mcp Ap2 MCP server in PolicyLayer and add a rule for list_price_lists: 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 Ap2. Nothing to install.

What risk level is list_price_lists? +

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

Can I rate-limit list_price_lists? +

Yes. Add a rate_limit block to the list_price_lists 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_lists completely? +

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

list_price_lists is provided by the Mcp Ap2 MCP server (@codespar/mcp-ap2). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Mcp Ap2 tool call.

Start from Mcp Ap2, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →