add-comment · Todoist MCP: Risk & Policy

WHAT IT DOES

What add-comment does on Todoist MCP

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

WHY IT NEEDS A POLICY

Why add-comment needs a policy

Adding a comment creates new data within Todoist but does not modify existing task/project structure irreversibly, execute code, move money, or delete anything. It is a straightforward Write operation with minimal blast radius—worst case, an unwanted comment is added but can be removed. Severity is low because commenting has no significant downstream effects on task execution or financial systems.

From the tool's definition Tool description states 'Add a comment to a task or project' — the word 'Add' indicates creation of new data (a comment). This is a reversible write operation; comments can be deleted (as evidenced by the sibling tool 'delete-comment').

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add-comment Rate-limited

add-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-comment": {
      "limits": [
        {
          "counter": "add-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, so you can run agents against it safely.

FAQ

Questions about add-comment

What does the add-comment tool do? +

Add a comment to a task or project. It is categorised as a Write tool in the Todoist MCP 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-comment? +

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

What risk level is add-comment? +

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

Can I rate-limit add-comment? +

Yes. Add a rate_limit block to the add-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-comment completely? +

Set action: deny in the PolicyLayer policy for add-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-comment? +

add-comment is provided by the Todoist MCP server (jdh747/todoist-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.