AI agents call findOneNote to retrieve information from Twenty MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves a single note by its identifier (likely with optional depth parameter for nested data). It performs a read-only query with no side effects, no data creation or modification, and no irreversible actions. The blast radius of misuse is minimal—worst case an agent retrieves unintended note content, which is a data exposure concern but not operationally destructive.
From the tool's definition Tool name 'findOneNote' and description 'can be provided to request your note' indicate a retrieval operation. The verb 'find' combined with 'One' and the phrasing 'request your note' clearly describe a query/fetch action with no modification or deletion.
Documented attack patterns abuse exactly the kind of access findOneNote gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Twenty MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for findOneNote:
{
"version": "1",
"default": "deny",
"tools": {
"findOneNote": {}
}
}findOneNote is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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depth can be provided to request your note. It is categorised as a Read tool in the Twenty MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Twenty MCP Server MCP server in PolicyLayer and add a rule for findOneNote: 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 Twenty MCP Server. Nothing to install.
findOneNote 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 findOneNote 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 findOneNote. 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.
findOneNote is provided by the Twenty MCP Server MCP server (jdu278/twenty-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Twenty 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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219 Twenty MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.