group-add-user

Add or update a user\

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

The tool modifies group membership by adding or updating a user record. This is a Write-category operation because it creates or modifies data reversibly. Severity is medium because unauthorized user additions could compromise group access controls or privacy, but the action itself is not destructive and can be undone by removing the user later.

From the tool's definition Tool performs 'Add or update a user' on a group — this is a reversible state change (create/update operation) with no permanent deletion or destructive action.

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 or update a user\. 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.

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