AI agents call closest_mode to retrieve information from Epicure MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The server is explicitly read-only and designed for querying culinary embeddings. While the specific tool description is empty, the name and sibling tools on the server indicate this performs a query or lookup operation with no side effects. This aligns with the 'Read' category for retrieval/query operations without modifications.
From the tool's definition Tool is on a 'read-only MCP server' described as offering 'tools for ingredient pairings, flavor profiling, and culinary exploration via cosine similarity and other embedding analyses.' Sibling tools like 'find_pairings', 'flavour_correlations', 'neighbors',…
Documented attack patterns abuse exactly the kind of access closest_mode gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Epicure MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for closest_mode:
{
"version": "1",
"default": "deny",
"tools": {
"closest_mode": {}
}
}closest_mode is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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closest_mode. It is categorised as a Read tool in the Epicure MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Epicure MCP Server MCP server in PolicyLayer and add a rule for closest_mode: 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 Epicure MCP Server. Nothing to install.
closest_mode 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 closest_mode 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 closest_mode. 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.
closest_mode is provided by the Epicure MCP Server MCP server (kaikaku-ai/epicure-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Epicure MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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13 Epicure MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.