group-set-roles

Define role names and their permissions in a NIP-29 group (kind 9007 admin event). Each role entry is { name, permissions? }.

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-set-roles.md

WHAT IT DOES

What group-set-roles does on Nostr Bray

AI agents use group-set-roles 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-set-roles is rated Medium

This is a Write operation because it creates/modifies group metadata (role definitions) in a Nostr admin event (NIP-29 kind 9007), rather than deleting or executing arbitrary code. Severity is medium: misuse could grant unintended permissions within a group or lock users out of features, but the blast radius is scoped to that specific group.

From the tool's definition Tool performs an admin-level operation on a Nostr group: 'Define role names and their permissions in a NIP-29 group (kind 9007 admin event)'.

Risk signalsAdmin/system-level operation

Attacks that exploit this kind of access

RECOMMENDED RULE

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

group-set-roles Rate-limited

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

FAQ

Questions about group-set-roles

What does the group-set-roles tool do? +

Define role names and their permissions in a NIP-29 group (kind 9007 admin event). Each role entry is { name, permissions? }. 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-set-roles? +

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

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

Can I rate-limit group-set-roles? +

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

Set action: deny in the PolicyLayer policy for group-set-roles. 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-set-roles? +

group-set-roles 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 240 Nostr Bray tools →

Across the catalogue

set-prioity on Kanban MCP Server →team_manager_set_sources on Team Manager MCP →qt_set_property on Qt → The MCP Attack Database →

Guides

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