stop_focus_session · Todos MCP: Risk & Policy

WHAT IT DOES

What stop_focus_session does on Todos

AI agents use stop_focus_session 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 stop_focus_session needs a policy

This tool stops an active focus session and writes time-tracking data (logs task time). It modifies state by ending a session and recording data, but this is reversible/non-destructive. No code execution, financial transactions, or irreversible deletions are involved.

From the tool's definition Stop a focus session and log task time when linked to a task

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

stop_focus_session Rate-limited

stop_focus_session 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": {
    "stop_focus_session": {
      "limits": [
        {
          "counter": "stop_focus_session_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 stop_focus_session

What does the stop_focus_session tool do? +

Stop a focus session and log task time when linked to a task. 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 stop_focus_session? +

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

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

Can I rate-limit stop_focus_session? +

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

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

stop_focus_session 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.