patch_listings_item

THE RISK

Medium Risk

Why patch_listings_item needs a policy

This tool modifies seller listings in the AFIP electronic invoicing system (likely e-commerce listings associated with tax invoices). Updates are reversible and do not permanently destroy data, placing it in Write rather than Destructive.

From the tool's definition Tool description states 'Partially update a listing item' and 'change specific attributes without replacing the full listing,' indicating reversible modification of marketplace listing data.

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

POLICY

How to control patch_listings_item

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 patch_listings_item:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "patch_listings_item": {
      "limits": [
        {
          "counter": "patch_listings_item_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

patch_listings_item stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. 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.

LIMIT THIS TOOL →

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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.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about patch_listings_item

What does the patch_listings_item tool do? +

Partially update a listing item for the seller by SKU using a JSON Patch list of operations. Use this to change specific attributes without replacing the full listing. It is categorised as a Write tool in the Mcp Afip MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on patch_listings_item? +

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

patch_listings_item is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit patch_listings_item? +

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

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

patch_listings_item 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 →