create_memo · Memos MCP: Risk & Policy

WHAT IT DOES

What create_memo does on Memos

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

WHY IT NEEDS A POLICY

Why create_memo needs a policy

This tool creates new data (memos) in the Memos service in a reversible manner. It does not delete, destroy, execute code, or move money. The impact is bounded to memo creation, making it Write category with medium severity—misuse could flood the system with spam or unwanted records, but effects are reversible via deletion.

From the tool's definition Tool named 'create_memo' with description indicating memo creation. Server description states the tool can 'write...and manage memos, including creating comments.' The Chinese description '创建新备忘录' translates to 'create a new memo,' confirming write…

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_memo Rate-limited

create_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": {
    "create_memo": {
      "limits": [
        {
          "counter": "create_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 Memos, so you can run agents against it safely.

FAQ

Questions about create_memo

What does the create_memo tool do? +

创建新备忘录. It is categorised as a Write tool in the Memos MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on create_memo? +

Register the Memos MCP server in PolicyLayer and add a rule for create_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 Memos. Nothing to install.

What risk level is create_memo? +

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

Can I rate-limit create_memo? +

Yes. Add a rate_limit block to the create_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 create_memo completely? +

Set action: deny in the PolicyLayer policy for create_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 create_memo? +

create_memo is provided by the Memos MCP server (yuzhi-jiang/memos-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.