add_subtask · TaskMateAI MCP: Risk & Policy

WHAT IT DOES

What add_subtask does on TaskMateAI

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

WHY IT NEEDS A POLICY

Why add_subtask needs a policy

This tool creates new subtask entities, which is a reversible modification operation. It does not execute arbitrary code, delete data, or affect financial systems. The action is Write-level because subtasks can be created, modified, or removed without permanent consequences.

From the tool's definition Tool description translates to 'Add a subtask to an existing task' - the verb indicates creation/modification of data (a subtask entity). Sibling tools like create_task, update_progress, and update_subtask confirm this is a Write-category server.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

add_subtask Rate-limited

add_subtask 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_subtask": {
      "limits": [
        {
          "counter": "add_subtask_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 TaskMateAI, so you can run agents against it safely.

FAQ

Questions about add_subtask

What does the add_subtask tool do? +

既存タスクにサブタスクを追加します。. It is categorised as a Write tool in the TaskMateAI 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_subtask? +

Register the TaskMateAI MCP server in PolicyLayer and add a rule for add_subtask: 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 TaskMateAI. Nothing to install.

What risk level is add_subtask? +

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

Can I rate-limit add_subtask? +

Yes. Add a rate_limit block to the add_subtask 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_subtask completely? +

Set action: deny in the PolicyLayer policy for add_subtask. 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_subtask? +

add_subtask is provided by the TaskMateAI MCP server (newaitees/taskmateai). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.