depth can be provided to request your calendarChannel
AI agents call findOneCalendarChannel 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.
The tool retrieves a single calendar channel record without modifying, deleting, or executing external operations. The 'find' pattern is a standard query operation. No side effects are described. Severity is low because reading CRM calendar data poses minimal risk even if misused by an agent.
From the tool's definition Tool name 'findOneCalendarChannel' with verb 'find' and description indicating it 'request[s] your calendarChannel' — typical read/query operation.
Documented attack patterns abuse exactly the kind of access findOneCalendarChannel 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 findOneCalendarChannel:
{
"version": "1",
"default": "deny",
"tools": {
"findOneCalendarChannel": {}
}
}findOneCalendarChannel 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 calendarChannel. 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 findOneCalendarChannel: 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.
findOneCalendarChannel 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 findOneCalendarChannel 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 findOneCalendarChannel. 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.
findOneCalendarChannel 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.