update-note · Notes MCP Server MCP: Risk & Policy

WHAT IT DOES

What update-note does on Notes MCP Server

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

WHY IT NEEDS A POLICY

Why update-note needs a policy

The tool modifies existing data reversibly (a note can be updated multiple times or reverted), which is the definition of Write category. It does not delete data (that would be Destructive via delete-note), nor does it execute arbitrary code.

From the tool's definition Tool name 'update-note' with description 'Update an existing note' indicates modification of existing data.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

update-note Rate-limited

update-note 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-note": {
      "limits": [
        {
          "counter": "update-note_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 Notes MCP Server, so you can run agents against it safely.

FAQ

Questions about update-note

What does the update-note tool do? +

Update an existing note. Aliases: updateNote, update_note. It is categorised as a Write tool in the Notes MCP Server 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-note? +

Register the Notes MCP Server MCP server in PolicyLayer and add a rule for update-note: 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 Notes MCP Server. Nothing to install.

What risk level is update-note? +

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

Can I rate-limit update-note? +

Yes. Add a rate_limit block to the update-note 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-note completely? +

Set action: deny in the PolicyLayer policy for update-note. 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-note? +

update-note is provided by the Notes MCP Server MCP server (surya07102000/notes-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.