update_shopping_list_item

THE RISK

Medium Risk

Why update_shopping_list_item needs a policy

This tool modifies shopping list data reversibly. Checking/unchecking items and changing amounts are non-destructive changes that can be undone. The operation creates no irreversible side effects, executes no external code, and involves no financial transactions. It fits the Write category as a create/update/modify operation.

From the tool's definition Tool name is 'update_shopping_list_item' and description states it updates an existing shopping list item (e.g., check/uncheck, change amount) — a reversible modification operation.

Documented attack patterns abuse exactly the kind of access update_shopping_list_item gives an agent:

POLICY

How to control update_shopping_list_item

PolicyLayer is an MCP gateway — it sits between your AI agents and Tandoor MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for update_shopping_list_item:

policy.json

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

update_shopping_list_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.

Create a free account and register Tandoor MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Tandoor MCP Server tools

Destructive remove_shopping_list_item Remove an item from the shopping list. Write add_shopping_list_item Add an item to the shopping list, allowing food/unit names or IDs. Write create_tandoor_meal_plan Add one or more recipes to the Tandoor meal plan for a specific date and meal type. Write create_tandoor_recipe Create a new recipe in Tandoor. Read get_foods List or search for foods. Read get_keywords List or search for keywords. Read get_meal_plans Retrieve meal plan entries from Tandoor, optionally filtering by date range and meal type. Read get_meal_types List all available meal types in Tandoor.

All 13 Tandoor MCP Server tools →

Write tools on other servers

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about update_shopping_list_item

What does the update_shopping_list_item tool do? +

Update an existing shopping list item (e.g., check/uncheck, change amount). It is categorised as a Write tool in the Tandoor 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 update_shopping_list_item? +

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

What risk level is update_shopping_list_item? +

update_shopping_list_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_list_item? +

Yes. Add a rate_limit block to the update_shopping_list_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_list_item completely? +

Set action: deny in the PolicyLayer policy for update_shopping_list_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_list_item? +

update_shopping_list_item is provided by the Tandoor MCP Server MCP server (starbuck93/tandoor-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Tandoor MCP Server tool call.

Start from Tandoor MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →