relay-set

Publish a kind 10002 relay list for the active identity. Warns if a relay list already exists.

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/relay-set.md

WHAT IT DOES

What relay-set does on Nostr Bray

AI agents use relay-set 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 relay-set is rated Medium

This tool creates or modifies relay configuration for a Nostr identity—a reversible action typical of Write operations. While publishing relay lists affects the identity's network connectivity preferences, it does not permanently delete data, execute arbitrary code, move funds, or cause irreversible damage.

From the tool's definition The tool 'Publish a kind 10002 relay list' performs a write operation. Kind 10002 is a Nostr event type for relay metadata. The description explicitly states 'Publish', which creates or modifies data.

Attacks that exploit this kind of access

RECOMMENDED RULE

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

relay-set Rate-limited

relay-set 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": {
    "relay-set": {
      "limits": [
        {
          "counter": "relay-set_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 relay-set call is checked against it from then on.

FAQ

Questions about relay-set

What does the relay-set tool do? +

Publish a kind 10002 relay list for the active identity. Warns if a relay list already exists. 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 relay-set? +

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

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

Can I rate-limit relay-set? +

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

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

relay-set 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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