community-list

Discover communities on Nostr (NIP-72). Fetches kind 34550 community definitions.

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/community-list.md

WHAT IT DOES

What community-list does on Nostr Bray

AI agents call community-list 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 community-list is rated Low

This tool queries and retrieves community metadata from Nostr without creating, modifying, deleting, or executing operations. It is a passive discovery/listing operation with no side effects. Blast radius is minimal—worst case is that an agent retrieves information it shouldn't see, but the tool itself cannot be misused to cause harm beyond information disclosure.

From the tool's definition Tool name is 'community-list' and description states 'Discover communities' and 'Fetches kind 34550 community definitions' — both verbs indicate read-only retrieval with no data modification or execution.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs community-list 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 community-list, this is the rule to start with:

community-list Allowed

community-list 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": {
    "community-list": {}
  }
}

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 community-list call is checked against it from then on.

FAQ

Questions about community-list

What does the community-list tool do? +

Discover communities on Nostr (NIP-72). Fetches kind 34550 community definitions. 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 community-list? +

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

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

Can I rate-limit community-list? +

Yes. Add a rate_limit block to the community-list 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 community-list completely? +

Set action: deny in the PolicyLayer policy for community-list. 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 community-list? +

community-list 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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