unarchive_task · Todos MCP: Risk & Policy

WHAT IT DOES

What unarchive_task does on Todos

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

WHY IT NEEDS A POLICY

Why unarchive_task needs a policy

This tool modifies task metadata reversibly by changing a task's status/state from archived back to pending. This is a Write operation because it creates or modifies data reversibly without destructive or financial consequences. Severity is medium because an agent misusing this could restore many archived tasks unintentionally, cluttering the task system, but changes are reversible (the task can be re-archived).

From the tool's definition Tool name 'unarchive_task' and description 'Restore an archived task back to pending' indicate modification of task state from archived to pending status.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

unarchive_task Rate-limited

unarchive_task 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": {
    "unarchive_task": {
      "limits": [
        {
          "counter": "unarchive_task_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 Todos, so you can run agents against it safely.

FAQ

Questions about unarchive_task

What does the unarchive_task tool do? +

Restore an archived task back to pending. It is categorised as a Write tool in the Todos MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on unarchive_task? +

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

What risk level is unarchive_task? +

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

Can I rate-limit unarchive_task? +

Yes. Add a rate_limit block to the unarchive_task 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 unarchive_task completely? +

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

unarchive_task is provided by the Todos MCP server (@hasna/todos). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.