update_memo · Mcp Todo MCP: Risk & Policy

WHAT IT DOES

What update_memo does on Mcp Todo

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

WHY IT NEEDS A POLICY

Why update_memo needs a policy

update_memo modifies existing memo data reversibly. This is a Write operation—data is changed but can be undone or corrected. It does not delete data (Destructive), execute arbitrary code (Execute), or involve financial transactions (Financial). The low severity reflects the limited blast radius: incorrect updates to personal memos pose minimal organizational risk and are easily corrected.

From the tool's definition Tool description states '기존 메모를 수정합니다' (modifies existing memo). Server description confirms it 'allows users to...update...notes'.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

update_memo Rate-limited

update_memo 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": {
    "update_memo": {
      "limits": [
        {
          "counter": "update_memo_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 Mcp Todo, so you can run agents against it safely.

FAQ

Questions about update_memo

What does the update_memo tool do? +

기존 메모를 수정합니다. It is categorised as a Write tool in the Mcp Todo MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on update_memo? +

Register the Mcp Todo MCP server in PolicyLayer and add a rule for update_memo: 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 Mcp Todo. Nothing to install.

What risk level is update_memo? +

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

Can I rate-limit update_memo? +

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

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

update_memo is provided by the Mcp Todo MCP server (moon-daeseung/mcp-todo). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.