canary-group-create

Create an encrypted CANARY verification group. All members share a secret seed

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/canary-group-create.md

WHAT IT DOES

What canary-group-create does on Nostr Bray

AI agents use canary-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 canary-group-create is rated Medium

This is a Write operation because it creates and persists new data (encrypted group, shared secret). It is not Destructive because the group creation itself is reversible (can be deleted). It is not Execute because it does not run arbitrary code or trigger external side effects dependent on user-controlled parameters.

From the tool's definition Tool name and description both indicate creation of a new encrypted group with shared cryptographic material ('Create' action, 'secret seed'). The tool irreversibly establishes a new persistent entity (the group) and initializes sensitive cryptographic state.

Attacks that exploit this kind of access

RECOMMENDED RULE

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

canary-group-create Rate-limited

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

FAQ

Questions about canary-group-create

What does the canary-group-create tool do? +

Create an encrypted CANARY verification group. All members share a secret seed. 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 canary-group-create? +

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

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

Can I rate-limit canary-group-create? +

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

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

canary-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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