archive_completed · Todos MCP: Risk & Policy

WHAT IT DOES

What archive_completed does on Todos

AI agents use archive_completed 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 archive_completed needs a policy

This tool modifies task data by changing task state to archived, which is a write operation. It is reversible (tasks can be unarchived), so it does not rise to Destructive. The scope is limited to completed tasks meeting a time threshold, reducing blast radius from critical to medium.

From the tool's definition Tool archives (moves/modifies state of) completed tasks older than a threshold. The word 'archive' indicates removal from active view by modifying task state, which is a reversible data modification.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

archive_completed Rate-limited

archive_completed 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": {
    "archive_completed": {
      "limits": [
        {
          "counter": "archive_completed_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 archive_completed

What does the archive_completed tool do? +

Auto-archive completed tasks older than the threshold (default 7 days). Returns count. 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 archive_completed? +

Register the Todos MCP server in PolicyLayer and add a rule for archive_completed: 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 archive_completed? +

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

Can I rate-limit archive_completed? +

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

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

archive_completed 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.