add_delivery · Parcel MCP Server MCP: Risk & Policy

WHAT IT DOES

What add_delivery does on Parcel MCP Server

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

WHY IT NEEDS A POLICY

Why add_delivery needs a policy

This tool creates new data (shipment records) in the parcel tracking system, which is reversible—deliveries can be removed or updated. It has moderate blast radius if misused (e.g., creating spurious shipments, polluting the tracking database), but does not delete data, execute arbitrary code, or involve financial transactions. Classified as Write rather than Read (retrieves data) or Execute (runs code/commands).

From the tool's definition Tool name 'add_delivery' and description 'Add a new delivery to Parcel for tracking' indicate creation of new shipment records in the delivery tracking system.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add_delivery Rate-limited

add_delivery 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": {
    "add_delivery": {
      "limits": [
        {
          "counter": "add_delivery_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 MCP Server, so you can run agents against it safely.

FAQ

Questions about add_delivery

What does the add_delivery tool do? +

Add a new delivery to Parcel for tracking. It is categorised as a Write tool in the Parcel MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on add_delivery? +

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

What risk level is add_delivery? +

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

Can I rate-limit add_delivery? +

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

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

add_delivery is provided by the Parcel MCP Server MCP server (nova-3951/parcel-api-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.