add_task_comment · Todoist MCP Server MCP: Risk & Policy

WHAT IT DOES

What add_task_comment does on Todoist MCP Server

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

WHY IT NEEDS A POLICY

Why add_task_comment needs a policy

This tool creates new comment records associated with tasks, which is a reversible write operation. While the description is empty, the tool name and server-level documentation clearly indicate it adds (writes) comments. Severity is medium because comments are generally low-risk data, though they could be used to spam or pollute task metadata.

From the tool's definition Tool name 'add_task_comment' combined with server description stating it 'add comments via the Todoist REST and Sync APIs'. Adding comments creates new data in the task management system.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add_task_comment Rate-limited

add_task_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": {
    "add_task_comment": {
      "limits": [
        {
          "counter": "add_task_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 MCP Server, so you can run agents against it safely.

FAQ

Questions about add_task_comment

What does the add_task_comment tool do? +

add_task_comment. It is categorised as a Write tool in the Todoist 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 add_task_comment? +

Register the Todoist MCP Server MCP server in PolicyLayer and add a rule for add_task_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 MCP Server. Nothing to install.

What risk level is add_task_comment? +

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

Can I rate-limit add_task_comment? +

Yes. Add a rate_limit block to the add_task_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 add_task_comment completely? +

Set action: deny in the PolicyLayer policy for add_task_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 add_task_comment? +

add_task_comment is provided by the Todoist MCP Server MCP server (stevesimpson418/todoist-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.