Search for crowd-sourced price data with filters (barcode, currency, etc.)
AI agents call searchPrices to retrieve information from OpenFoodFacts-mcp without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This is a read-only query operation that retrieves and filters existing price data. There are no side effects, no data modification, no code execution, and no financial transactions involved. The tool simply searches and returns information, making it a straightforward Read category with low severity since misuse would only result in unauthorized information access without operational impact.
From the tool's definition Tool performs a search for price data with filters (barcode, currency, etc.), retrieving crowd-sourced information from the OpenFoodFacts database without modifying, deleting, or executing operations.
Documented attack patterns abuse exactly the kind of access searchPrices gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and OpenFoodFacts-mcp, and nothing reaches the server without passing your rules. This is the rule we recommend for searchPrices:
{
"version": "1",
"default": "deny",
"tools": {
"searchPrices": {}
}
}searchPrices is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Search for crowd-sourced price data with filters (barcode, currency, etc.). It is categorised as a Read tool in the OpenFoodFacts-mcp MCP Server, which means it retrieves data without modifying state.
Register the OpenFoodFacts- MCP server in PolicyLayer and add a rule for searchPrices: 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 OpenFoodFacts-mcp. Nothing to install.
searchPrices 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 searchPrices 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 searchPrices. 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.
searchPrices is provided by the OpenFoodFacts- MCP server (jagjeevanak/openfoodfacts-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from OpenFoodFacts-mcp, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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21 OpenFoodFacts-mcp tools catalogued and risk-classified — across an index of 43,000+ MCP servers.