create_comment

THE RISK

Medium Risk

Why create_comment needs a policy

This tool creates new comment data within CRM records, which is a reversible write operation. It does not execute external code, delete data, or involve financial transactions. Severity is medium because uncontrolled comments could introduce spam, misinformation, or record pollution, but the effect is limited in scope and reversible via deletion.

From the tool's definition Tool name 'create_comment' and description 'Create a comment on any CRM record' indicate creation of new data (comment). The verb 'create' and action 'on any CRM record' show data modification without deletion or financial impact.

Documented attack patterns abuse exactly the kind of access create_comment gives an agent:

POLICY

How to control create_comment

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 create_comment:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "create_comment": {
      "limits": [
        {
          "counter": "create_comment_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

create_comment stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

Create a free account and register Twenty MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Twenty MCP Server tools

Write transfer_contact_to_company Transfer a contact (person) from one company to another Write link_opportunity_to_company Link an opportunity to a company and/or point of contact Write create_company Create a new company in Twenty CRM Write create_contact Create a new contact (person) in Twenty CRM Write create_note Create a new note in Twenty CRM Write create_opportunity Create a new opportunity/deal in Twenty CRM Write create_task Create a new task in Twenty CRM Write update_company Update an existing company in Twenty CRM

All 29 Twenty MCP Server tools →

Write tools on other servers

M-Team MCP Server download_torrent YouTube MCP Server generate_video_title Android Forensics ADB MCP Server combine_reports 0xarchive web3_signup

Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Argument validation → Checking tool call arguments against schema and policy before they run.
Scoped token → Per-person credentials that grant a defined subset of servers and tools.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about create_comment

What does the create_comment tool do? +

Create a comment on any CRM record. It is categorised as a Write tool in the Twenty MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on create_comment? +

Register the Twenty MCP Server MCP server in PolicyLayer and add a rule for create_comment: 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.

What risk level is create_comment? +

create_comment is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit create_comment? +

Yes. Add a rate_limit block to the create_comment 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.

How do I block create_comment completely? +

Set action: deny in the PolicyLayer policy for create_comment. 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.

What MCP server provides create_comment? +

create_comment is provided by the Twenty MCP Server MCP server (jezweb/twenty-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Twenty MCP Server tool call.

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.

CHECK YOUR STACK →