group-add-user

Add/update a member with kind 9000 and optional relay-defined role labels.

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-add-user.md

WHAT IT DOES

What group-add-user does on Nostr Bray

AI agents use group-add-user 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-add-user is rated Medium

This tool creates or modifies group membership records (kind 9000 is a Nostr event type for group membership). It does not execute arbitrary code, delete data irreversibly, or move financial assets. However, adding/updating group members could enable unauthorized access to group resources or DMs if misused by an agent without proper authorization checks, justifying medium severity.

From the tool's definition Tool description: "Add/update a member with kind 9000 and optional relay-defined role labels." The verb 'Add/update' indicates reversible modification of group membership data.

Attacks that exploit this kind of access

RECOMMENDED RULE

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

group-add-user Rate-limited

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

FAQ

Questions about group-add-user

What does the group-add-user tool do? +

Add/update a member with kind 9000 and optional relay-defined role labels. 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-add-user? +

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

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

Can I rate-limit group-add-user? +

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

Set action: deny in the PolicyLayer policy for group-add-user. 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-add-user? +

group-add-user 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.

KEEP EXPLORING

More on Nostr Bray, and thousands of servers like it.

This server

All 261 Nostr Bray tools →

Across the catalogue

add-tag on Kanban MCP Server →kb_add on Persistent Kb → The MCP Attack Database →

Guides

Govern customer-ops agents →Argument validation →Scoped token →