create_comment · Todoist MCP: Risk & Policy

WHAT IT DOES

What create_comment does on Todoist

AI agents use create_comment to create or update resources in Todoist — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Todoist environment.

WHY IT NEEDS A POLICY

Why create_comment needs a policy

Creating a comment is a reversible write operation that adds data to an existing task or project without deleting, destructing, or executing code. The scope is limited to comment creation, and the impact is low since comments do not modify task state or trigger financial/destructive actions. Confidence is high because the action is clearly creational and reversible.

From the tool's definition Tool name is 'create_comment' and description states 'Add a comment to a task or project', which creates new data (a comment) that can be edited or removed later.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_comment Rate-limited

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.

View as policy code

policy.json

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

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Todoist, so you can run agents against it safely.

FAQ

Questions about create_comment

What does the create_comment tool do? +

Add a comment to a task or project. One of task_id or project_id is required. It is categorised as a Write tool in the Todoist 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 Todoist 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 Todoist. 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 Todoist MCP server (sjvadrevu/todoist-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.