Food product lookup by UPC/EAN barcode via Open Food Facts (CC0, >3M products). Returns product name, brand, ingredients, allergens, nutriments (per-100g + per-serving), Nutri-Score (a-e), NOVA processing classification (1-4), Eco-Score, categories, manufacturing origin, packaging, product image ...
AI agents call food.barcode-lookup to retrieve information from Mcp without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This is a straightforward data retrieval tool that queries a public database (Open Food Facts) by barcode to return nutritional and product metadata. It has no side effects, cannot modify data, execute code, or commit financial obligations.
From the tool's definition Tool description states it 'lookup[s]' and 'returns' product information from Open Food Facts database. No creation, modification, deletion, code execution, or financial operations are performed. The tool retrieves and queries existing data only.
Attacks that exploit this kind of access
Food product lookup by UPC/EAN barcode via Open Food Facts (CC0, >3M products). Returns product name, brand, ingredients, allergens, nutriments (per-100g + per-serving), Nutri-Score (a-e), NOVA processing classification (1-4), Eco-Score, categories, manufacturing origin, packaging, product image URLs. It is categorised as a Read tool in the Mcp MCP Server, which means it retrieves data without modifying state.
Register the MCP server in PolicyLayer and add a rule for food.barcode-lookup: 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. Nothing to install.
food.barcode-lookup is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the food.barcode-lookup 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.
Set action: deny in the PolicyLayer policy for food.barcode-lookup. 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.
food.barcode-lookup is provided by the MCP server (@2sio/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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