group-create

Create a relay-scoped NIP-29 group with kind 9007. Bray generates an ID if omitted; metadata is sent separately with kind 9002 after creation succeeds.

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/group-create.md

WHAT IT DOES

What group-create does on Nostr Bray

AI agents use group-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 group-create is rated Medium

This tool creates new groups on a relay, which is a reversible modification of data (Write category). Severity is medium because while group creation itself is not destructive or financial, it modifies shared relay state and could be misused to spam groups or create malicious communities if an AI agent misuses the tool without proper authorization checks.

From the tool's definition Tool name 'group-create' and description 'Create a relay-scoped NIP-29 group' indicates the tool creates new data structures (groups) on a Nostr relay.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs group-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 group-create, this is the rule to start with:

group-create Rate-limited

group-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": {
    "group-create": {
      "limits": [
        {
          "counter": "group-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 group-create call is checked against it from then on.

FAQ

Questions about group-create

What does the group-create tool do? +

Create a relay-scoped NIP-29 group with kind 9007. Bray generates an ID if omitted; metadata is sent separately with kind 9002 after creation succeeds. 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 group-create? +

Register the Nostr Bray MCP server in PolicyLayer and add a rule for group-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 group-create? +

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

Can I rate-limit group-create? +

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

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

group-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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