reorder_favorite · Mcp Starbucks MCP: Risk & Policy

WHAT IT DOES

What reorder_favorite does on Mcp Starbucks

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

WHY IT NEEDS A POLICY

Why reorder_favorite needs a policy

This tool modifies cart state by adding items to it, which is a reversible write operation. It does not place or finalize an order itself — a separate place_order call would be needed to commit a financial transaction. However, if misused, it could load unwanted items into the cart that might then be ordered, so severity is medium.

From the tool's definition 'reorder from a past order — loads all items from a previous order back into your cart'

Risk signalsBulk/mass operation — affects multiple targets

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

reorder_favorite Rate-limited

reorder_favorite 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": {
    "reorder_favorite": {
      "limits": [
        {
          "counter": "reorder_favorite_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 Mcp Starbucks, so you can run agents against it safely.

FAQ

Questions about reorder_favorite

What does the reorder_favorite tool do? +

Quickly reorder from a past order — loads all items from a previous order back into your cart. Requires being logged in. It is categorised as a Write tool in the Mcp Starbucks MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on reorder_favorite? +

Register the Mcp Starbucks MCP server in PolicyLayer and add a rule for reorder_favorite: 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 Starbucks. Nothing to install.

What risk level is reorder_favorite? +

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

Can I rate-limit reorder_favorite? +

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

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

reorder_favorite is provided by the Mcp Starbucks MCP server (markswendsen-code/mcp-starbucks). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.