note_create · MCP Object-Authz Lab MCP: Risk & Policy

WHAT IT DOES

What note_create does on MCP Object-Authz Lab

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

WHY IT NEEDS A POLICY

Why note_create needs a policy

This tool creates new data (notes) reversibly, fitting the Write category. Severity is medium because while note creation is not destructive, the server's documented focus on authorization vulnerabilities suggests a realistic risk that an AI agent could be tricked into creating notes in unauthorized organizational contexts or for unintended tenants.

From the tool's definition Tool name 'note_create' and description 'Create a note in your organization' explicitly indicate creation of new data.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

note_create Rate-limited

note_create 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": {
    "note_create": {
      "limits": [
        {
          "counter": "note_create_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 MCP Object-Authz Lab, so you can run agents against it safely.

FAQ

Questions about note_create

What does the note_create tool do? +

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

How do I enforce a policy on note_create? +

Register the MCP Object-Authz Lab MCP server in PolicyLayer and add a rule for note_create: 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 MCP Object-Authz Lab. Nothing to install.

What risk level is note_create? +

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

Can I rate-limit note_create? +

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

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

note_create is provided by the MCP Object-Authz Lab MCP server (wrg-11/mcp-objauthz-lab). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.