relay-info

Fetch the NIP-11 relay information document for a relay URL.

SERVERNostr Bray SOURCEnostr-bray

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/dev-forgesworn-bray/relay-info.md

WHAT IT DOES

What relay-info does on Nostr Bray

AI agents call relay-info to retrieve information from Nostr Bray without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why relay-info is rated Low

This tool retrieves publicly available relay metadata (NIP-11 information document) from a specified relay URL. Fetching metadata is a read-only operation with no capability to modify, delete, or execute code. The blast radius of misuse is minimal—an agent could only retrieve information already intended to be public by relay operators.

From the tool's definition Tool name 'relay-info' and description 'Fetch the NIP-11 relay information document' indicate a retrieval operation with no side effects. NIP-11 is a Nostr protocol standard for relay metadata.

Attacks that exploit this kind of access

RECOMMENDED RULE

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

relay-info Allowed

relay-info is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "relay-info": {}
  }
}

ALLOW ONLY 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-info call is checked against it from then on.

FAQ

Questions about relay-info

What does the relay-info tool do? +

Fetch the NIP-11 relay information document for a relay URL. It is categorised as a Read tool in the Nostr Bray MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on relay-info? +

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

relay-info is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit relay-info? +

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

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

relay-info 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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