createNote · Memnote MCP: Risk & Policy

WHAT IT DOES

What createNote does on Memnote

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

PARAMETERS

Parameter	Type	Required	Description
`body`	object	Yes

Parameters from the server's own tool schema.

WHY IT NEEDS A POLICY

Why createNote needs a policy

This tool creates new notes, which is a reversible write operation. It modifies state by adding data but does not execute code, delete data, move money, or trigger external operations. The context of a note-taking application (MemNote) confirms this is a standard data creation function with minimal blast radius—worst case is creation of unwanted notes that can be deleted via the sibling deleteNote tool.

From the tool's definition Tool name 'createNote' and description 'Create a note' indicate creation of new data without destructive, financial, or execution capabilities.

Risk signalsAccepts raw HTML/template content (body)

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

createNote Rate-limited

createNote 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": {
    "createNote": {
      "limits": [
        {
          "counter": "createnote_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 Memnote, so you can run agents against it safely.

FAQ

Questions about createNote

What does the createNote tool do? +

Create a note. It is categorised as a Write tool in the Memnote MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

What parameters does createNote accept? +

createNote accepts 1 parameter: body. Required: body. The full parameter table on this page comes from the server's own tool schema.

How do I enforce a policy on createNote? +

Register the Memnote MCP server in PolicyLayer and add a rule for createNote: 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 Memnote. Nothing to install.

What risk level is createNote? +

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

Can I rate-limit createNote? +

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

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

createNote is provided by the Memnote MCP server (@randomfact/memnote-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.