sync_packages · Parcel Pilot MCP: Risk & Policy

WHAT IT DOES

What sync_packages does on Parcel Pilot MCP

AI agents use sync_packages to create or update resources in Parcel Pilot MCP — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Parcel Pilot MCP environment.

WHY IT NEEDS A POLICY

Why sync_packages needs a policy

This tool writes package data into a local cache after synchronizing from Taobao and JD. While it doesn't destructively delete data or execute arbitrary code, it modifies the local state by populating the cache. The severity is medium because misuse could result in stale or corrupted cached data affecting downstream queries, but the blast radius is limited to the local cache.

From the tool's definition Tool description states 'Sync packages... into the local cache', which implies writing/caching data from external sources. The verb 'sync' typically involves creating or modifying cached records.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

sync_packages Rate-limited

sync_packages 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.

View as policy code

policy.json

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

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Parcel Pilot MCP, so you can run agents against it safely.

FAQ

Questions about sync_packages

What does the sync_packages tool do? +

Sync packages from logged-in Taobao and JD browser sessions into the local cache. It is categorised as a Write tool in the Parcel Pilot MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on sync_packages? +

Register the Parcel Pilot MCP server in PolicyLayer and add a rule for sync_packages: 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 Parcel Pilot MCP. Nothing to install.

What risk level is sync_packages? +

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

Can I rate-limit sync_packages? +

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

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

sync_packages is provided by the Parcel Pilot MCP server (jieyangxchen/parcel-pilot-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.