AI agents call expunge_search to permanently remove resources in Evernote MCP Server — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
This tool irreversibly deletes data (a saved search) without the possibility of recovery or reversal. While the blast radius is more limited than deleting notes themselves, permanent deletion of user-created searches represents a destructive action that satisfies the definition of the Destructive category.
From the tool's definition Tool description states "Permanently delete a saved search" - the word "Permanently" combined with "delete" indicates an irreversible operation that cannot be undone.
Documented attack patterns abuse exactly the kind of access expunge_search gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Evernote MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for expunge_search:
{
"version": "1",
"default": "deny",
"hide": [
"expunge_search"
]
}expunge_search disappears from the agent's tool list entirely, and any attempt to call it is denied. The rest of the server keeps working.
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Permanently delete a saved search. It is categorised as a Destructive tool in the Evernote MCP Server MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Evernote MCP Server MCP server in PolicyLayer and add a rule for expunge_search: 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 Evernote MCP Server. Nothing to install.
expunge_search is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the expunge_search 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 expunge_search. 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.
expunge_search is provided by the Evernote MCP Server MCP server (kensou24/evernote-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Evernote MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
52 Evernote MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.