scan_reminders · Todos MCP: Risk & Policy

WHAT IT DOES

What scan_reminders does on Todos

AI agents use scan_reminders 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 scan_reminders needs a policy

The tool scans tasks (read) but also upserts (creates or updates) local reminder records, which is a write operation. 'Upsert' means insert or update, making it reversible and fitting the Write category. Severity is medium as misuse could create spurious or erroneous reminder records affecting task management workflows.

From the tool's definition upsert local reminder records

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

scan_reminders Rate-limited

scan_reminders 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": {
    "scan_reminders": {
      "limits": [
        {
          "counter": "scan_reminders_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 scan_reminders

What does the scan_reminders tool do? +

Scan tasks for due-date and SLA reminders; upsert local reminder records. 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 scan_reminders? +

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

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

Can I rate-limit scan_reminders? +

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

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

scan_reminders 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.