createNostrEvent · Nostr Tools for AI Agents MCP

WHAT IT DOES

What createNostrEvent does on Nostr Tools for AI Agents

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

WHY IT NEEDS A POLICY

Why createNostrEvent needs a policy

This tool creates unsigned Nostr events, which is a reversible write operation—it generates new data objects but does not execute, delete, or finalize them on the network.

From the tool's definition Tool name 'createNostrEvent' and description 'Create an unsigned Nostr event of any kind' indicate creation of data structures. Related sibling tools include 'postNote', 'createNote', and 'createProfile', which are write operations.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

createNostrEvent Rate-limited

createNostrEvent 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": {
    "createNostrEvent": {
      "limits": [
        {
          "counter": "createnostrevent_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 Nostr Tools for AI Agents, so you can run agents against it safely.

FAQ

Questions about createNostrEvent

What does the createNostrEvent tool do? +

Create an unsigned Nostr event of any kind. It is categorised as a Write tool in the Nostr Tools for AI Agents MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on createNostrEvent? +

Register the Nostr Tools for AI Agents MCP server in PolicyLayer and add a rule for createNostrEvent: 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 Nostr Tools for AI Agents. Nothing to install.

What risk level is createNostrEvent? +

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

Can I rate-limit createNostrEvent? +

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

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

createNostrEvent is provided by the Nostr Tools for AI Agents MCP server (jorgenclaw/nostr-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.