modify_delivery · HelloFresh MCP Server MCP: Risk & Policy

WHAT IT DOES

What modify_delivery does on HelloFresh MCP Server

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

WHY IT NEEDS A POLICY

Why modify_delivery needs a policy

This tool creates or modifies data reversibly by changing a scheduled delivery date. While it affects a financial service (meal subscriptions), it does not move money or commit new financial obligations—it merely reschedules an existing order. The user can change the delivery date again or cancel. It is therefore Write rather than Financial or Destructive.

From the tool's definition Tool name 'modify_delivery' and description 'Change the delivery date for an upcoming week' indicate a reversible modification to an existing delivery schedule.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

modify_delivery Rate-limited

modify_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": {
    "modify_delivery": {
      "limits": [
        {
          "counter": "modify_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 HelloFresh MCP Server, so you can run agents against it safely.

FAQ

Questions about modify_delivery

What does the modify_delivery tool do? +

Change the delivery date for an upcoming week. It is categorised as a Write tool in the HelloFresh 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 modify_delivery? +

Register the HelloFresh MCP Server MCP server in PolicyLayer and add a rule for modify_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 HelloFresh MCP Server. Nothing to install.

What risk level is modify_delivery? +

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

Can I rate-limit modify_delivery? +

Yes. Add a rate_limit block to the modify_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 modify_delivery completely? +

Set action: deny in the PolicyLayer policy for modify_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 modify_delivery? +

modify_delivery is provided by the HelloFresh MCP Server MCP server (markswendsen-code/mcp-hellofresh). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.