add-comment

THE RISK

Medium Risk

Why add-comment needs a policy

This tool creates new data (a comment) on an existing task in a reversible manner. Comments can be edited or deleted, making this a Write operation rather than Destructive. The blast radius is minimal—adding a comment affects only the specific task and is easily undone. This does not retrieve data (Read), execute arbitrary code (Execute), permanently delete data (Destructive), or move money (Financial).

From the tool's definition Tool name 'add-comment' and description 'Add a comment to an existing task' indicate creation of new comment data on a task resource.

Documented attack patterns abuse exactly the kind of access add-comment gives an agent:

POLICY

How to control add-comment

PolicyLayer is an MCP gateway — it sits between your AI agents and KanbanFlow MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for add-comment:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "add-comment": {
      "limits": [
        {
          "counter": "add-comment_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

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.

Create a free account and register KanbanFlow 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 KanbanFlow MCP Server tools

Write add-label Add a label to an existing task Write add-subtask Add a subtask to an existing task Write add-subtasks Add multiple subtasks to an existing task in one operation Write create-task Create a new task on the board Write create-task-with-subtasks Create a new task and add multiple subtasks to it in one operation Write set-task-due-date Set or update a due date for a task Write update-comment Update an existing comment on a task Write update-custom-field Set or update a custom field value on a task

All 16 KanbanFlow 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 add-comment

What does the add-comment tool do? +

Add a comment to an existing task. It is categorised as a Write tool in the KanbanFlow 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-comment? +

Register the KanbanFlow MCP Server 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 KanbanFlow MCP Server. 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 KanbanFlow MCP Server MCP server (williamavholmberg/kanbanflow-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every KanbanFlow MCP Server tool call.

Start from KanbanFlow 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 →