update_shopping_item · Mcp Mealie MCP: Risk & Policy

WHAT IT DOES

What update_shopping_item does on Mcp Mealie

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

WHY IT NEEDS A POLICY

Why update_shopping_item needs a policy

This tool modifies shopping list items by updating their checked status, which is a reversible write operation. It does not delete data (not Destructive), does not execute arbitrary code (not Execute), involves no financial transactions (not Financial), and does not read-only (not Read). The impact is limited to a single shopping item's state, making it low severity.

From the tool's definition Tool name contains 'update' and description says 'Patch a shopping item', indicating modification of existing data. The parameters (checked: 0/1/-1) show it modifies item state reversibly.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

update_shopping_item Rate-limited

update_shopping_item 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": {
    "update_shopping_item": {
      "limits": [
        {
          "counter": "update_shopping_item_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 Mealie, so you can run agents against it safely.

FAQ

Questions about update_shopping_item

What does the update_shopping_item tool do? +

Patch a shopping item. checked: 0=unchecked, 1=checked, -1=leave. It is categorised as a Write tool in the Mcp Mealie MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on update_shopping_item? +

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

What risk level is update_shopping_item? +

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

Can I rate-limit update_shopping_item? +

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

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

update_shopping_item is provided by the Mcp Mealie MCP server (obrien-matthew/mcp-mealie). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.