label-create

Label an event, pubkey, or addressable event using NIP-32 (kind 1985).

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/label-create.md

WHAT IT DOES

What label-create does on Nostr Bray

AI agents use label-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 label-create is rated Medium

The tool creates (writes) label metadata on the Nostr protocol without permanently deleting data. While labeling is a write operation that could be misused to spam, defame, or manipulate trust signals in a social network, the effects are reversible (labels can be removed or overwritten).

From the tool's definition Tool description states 'Label an event, pubkey, or addressable event using NIP-32 (kind 1985)' — this creates a new label record, which is a reversible write operation that modifies the Nostr event graph.

Attacks that exploit this kind of access

RECOMMENDED RULE

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

label-create Rate-limited

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

FAQ

Questions about label-create

What does the label-create tool do? +

Label an event, pubkey, or addressable event using NIP-32 (kind 1985). 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 label-create? +

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

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

Can I rate-limit label-create? +

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

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

label-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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