track_bulk

THE RISK

Low Risk

Why track_bulk needs a policy

This tool retrieves package status information from a shipping carrier (Correios, Brazil's postal service). It performs no side effects: it does not modify package data, execute external commands, delete records, or move money. The 50-package batch limit does not change the fundamental read-only nature.

From the tool's definition Tool description states 'Track multiple Correios packages in a single call' — tracking is a retrieval operation with no modification, creation, deletion, or financial transaction.

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

POLICY

How to control track_bulk

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 track_bulk:

policy.json

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

track_bulk 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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All 1300 Mcp Ap2 tools →

Read tools on other servers

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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 track_bulk

What does the track_bulk tool do? +

Track multiple Correios packages in a single call (up to 50 codes). 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 track_bulk? +

Register the Mcp Ap2 MCP server in PolicyLayer and add a rule for track_bulk: 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 track_bulk? +

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

Can I rate-limit track_bulk? +

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

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

track_bulk 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 →