calendar-create

Create a calendar event (NIP-52). Auto-detects date-based (kind 31922, YYYY-MM-DD) vs time-based (kind 31923, ISO datetime). Returns the signed event and publish result.

SERVERNostr Bray SOURCEnostr-bray

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/dev-forgesworn-bray/calendar-create.md

WHAT IT DOES

What calendar-create does on Nostr Bray

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

RISK

Why calendar-create is rated Medium

This tool creates new calendar events in a Nostr network, modifying the user's published data. It is reversible (events can be deleted or superseded), so it is Write not Destructive. Severity is medium because calendar spam or injection of false events could degrade user experience and trust, but the blast radius is limited to calendar data without direct financial, operational, or system-wide impact.

From the tool's definition Tool explicitly 'Create[s] a calendar event' via NIP-52 (Nostr event protocol). The description confirms data creation: 'Create a calendar event' with 'Returns the signed event and publish result' indicating persistent storage/broadcast.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs calendar-create safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Nostr Bray, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For calendar-create, this is the rule to start with:

calendar-create Rate-limited

calendar-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": {
    "calendar-create": {
      "limits": [
        {
          "counter": "calendar-create_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Nostr Bray, apply this rule, and every calendar-create call is checked against it from then on.

FAQ

Questions about calendar-create

What does the calendar-create tool do? +

Create a calendar event (NIP-52). Auto-detects date-based (kind 31922, YYYY-MM-DD) vs time-based (kind 31923, ISO datetime). Returns the signed event and publish result. It is categorised as a Write tool in the Nostr Bray MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on calendar-create? +

Register the Nostr Bray MCP server in PolicyLayer and add a rule for calendar-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 Nostr Bray. Nothing to install.

What risk level is calendar-create? +

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

Can I rate-limit calendar-create? +

Yes. Add a rate_limit block to the calendar-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 calendar-create completely? +

Set action: deny in the PolicyLayer policy for calendar-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 calendar-create? +

calendar-create is provided by the Nostr Bray MCP server (nostr-bray). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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