plan_and_shop

THE RISK

Medium Risk

Why plan_and_shop needs a policy

This tool creates and modifies user-specific data artifacts (meal plans and shopping lists) but does not delete or destroy data (ruling out Destructive), does not execute arbitrary code or trigger external operations beyond its defined workflow (ruling out Execute), and does not involve financial transactions (ruling out Financial). The reversible creation/modification of planning data makes it a Write operation.

From the tool's definition Tool description states it will 'generate a shopping list' and 'optimize a weekly meal plan,' indicating creation and modification of user data (meal plans, shopping lists).

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

POLICY

How to control plan_and_shop

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

policy.json

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

plan_and_shop 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 TilbudsTrolden — 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 TilbudsTrolden tools

Destructive remove_recipe Remove a recipe by name. USE WHEN: cleaning up the recipe library. Case-insensitive name m Write log_meal Record a cooked meal for rotation tracking. USE WHEN: logging what was cooked to avoid rep Write log_spend Record grocery spending for budget tracking. USE WHEN: logging what was spent after a shop Write add_recipe Add or update a recipe for meal planning and deal scoring. USE WHEN: saving a new recipe o Write generate_shopping_list Deal-optimized shopping list from specific recipes, grouped by store. USE WHEN: preparing Write update_household Set household members, dietary restrictions, preferred stores, country, servings. USE WHEN Write update_pantry Add or remove pantry items (excluded from shopping lists). USE WHEN: updating stock after Read deals_this_week Show the best current deals from your preferred stores. USE WHEN: browsing what

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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 plan_and_shop

What does the plan_and_shop tool do? +

Score recipes, optimize a weekly meal plan, and generate a shopping list in one step. USE WHEN:. It is categorised as a Write tool in the TilbudsTrolden MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on plan_and_shop? +

Register the TilbudsTrolden MCP server in PolicyLayer and add a rule for plan_and_shop: 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 TilbudsTrolden. Nothing to install.

What risk level is plan_and_shop? +

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

Can I rate-limit plan_and_shop? +

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

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

plan_and_shop is provided by the TilbudsTrolden MCP server (olgasafonova/tilbudstrolden-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every TilbudsTrolden tool call.

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

CHECK YOUR STACK →