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

The tool creates new memo records without deleting or overwriting existing data. Creation is reversible—memos can be updated or deleted later using sibling tools. There is no code execution, external operation triggering, or financial impact. This fits the Write category: creates or modifies data reversibly.

From the tool's definition Tool name is 'create_memo' and description states 'Create a new memo'. Server description confirms the tool 'create[s]...memos'. This is a reversible data creation operation.

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? +

Create a new memo. 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 (mylxsw/memos-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.