picnic_clear_cart

THE RISK

Critical Risk

Why picnic_clear_cart needs a policy

Clearing a cart removes all items at once with no indication of reversibility. While it doesn't delete permanent data (orders, account info), it destroys the user's carefully curated cart contents in a single action. This is analogous to a bulk delete operation, making it Destructive. Severity is high because an AI agent misusing this tool could wipe a large grocery order without recovery.

From the tool's definition 'Clear all items from the shopping cart' — removes all cart contents irreversibly

Risk signalsBulk/mass operation — affects multiple targets

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

POLICY

How to control picnic_clear_cart

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

policy.json

{
  "version": "1",
  "default": "deny",
  "hide": [
    "picnic_clear_cart"
  ]
}

picnic_clear_cart disappears from the agent's tool list entirely, and any attempt to call it is denied. The rest of the server keeps working.

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

RESTRICT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More MCP Picnic tools

Destructive picnic_cancel_delivery Cancel a delivery order Execute picnic_verify_2fa_code Verify a 2FA code Write picnic_remove_from_cart Remove a product from the shopping cart Write picnic_rate_delivery Rate a completed delivery Write picnic_add_to_cart Add a product to the shopping cart Write picnic_send_delivery_invoice_email Send or resend the invoice email for a completed delivery Write picnic_set_delivery_slot Select a delivery time slot Read picnic_get_cart Get the current shopping cart contents with filtered data

All 25 MCP Picnic tools →

Destructive tools on other servers

Android Forensics ADB MCP Server create_full_backup 0xarchive web3_revoke_key Frida Game Hacking MCP clear_scan cPanel MCP Server clear_spam_box

Go deeper

Critical-risk tools in MCP Picnic → Every critical-risk tool this server exposes, in one view.
All critical-risk MCP tools → Every critical-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Blast radius → How much damage one compromised or confused agent can do — and how to bound it.
Tool call approval → Approval gates on individual tool calls: auto-allow, prompt, or deny.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about picnic_clear_cart

What does the picnic_clear_cart tool do? +

Clear all items from the shopping cart. It is categorised as a Destructive tool in the MCP Picnic MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.

How do I enforce a policy on picnic_clear_cart? +

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

What risk level is picnic_clear_cart? +

picnic_clear_cart is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.

Can I rate-limit picnic_clear_cart? +

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

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

picnic_clear_cart is provided by the MCP Picnic MCP server (ivo-toby/mcp-picnic). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every MCP Picnic tool call.

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

CHECK YOUR STACK →