pin_note · NotesKeep MCP Server MCP: Risk & Policy

WHAT IT DOES

What pin_note does on NotesKeep MCP Server

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

WHY IT NEEDS A POLICY

Why pin_note needs a policy

Pinning a note modifies its metadata/state to make it more prominent, but the change is fully reversible (unpinning restores prior state). This is a Write operation—it alters data reversibly without destruction or execution of external code. Low severity due to contained scope and reversibility of the action.

From the tool's definition Tool name 'pin_note' suggests toggling a note's pinned state, which is a reversible state modification. The server description explicitly mentions 'organizing' notes, and pinning is a common organizational operation.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

pin_note Rate-limited

pin_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": {
    "pin_note": {
      "limits": [
        {
          "counter": "pin_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 NotesKeep MCP Server, so you can run agents against it safely.

FAQ

Questions about pin_note

What does the pin_note tool do? +

pin_note. It is categorised as a Write tool in the NotesKeep 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 pin_note? +

Register the NotesKeep MCP Server MCP server in PolicyLayer and add a rule for pin_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 NotesKeep MCP Server. Nothing to install.

What risk level is pin_note? +

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

Can I rate-limit pin_note? +

Yes. Add a rate_limit block to the pin_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 pin_note completely? +

Set action: deny in the PolicyLayer policy for pin_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 pin_note? +

pin_note is provided by the NotesKeep MCP Server MCP server (mariomosca/noteskeep-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.