signet-vouch

Vouch for another user by publishing a kind 31000 attestation signed by the active identity. Use

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/signet-vouch.md

WHAT IT DOES

What signet-vouch does on Nostr Bray

AI agents use signet-vouch 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 signet-vouch is rated Medium

This tool creates and publishes a signed attestation (vouching record) on Nostr, which is a reversible write operation. It modifies social trust state by creating a new record but does not irreversibly delete data or move money. Misuse could harm reputation or trust networks by falsely vouching for malicious actors, hence medium severity.

From the tool's definition Vouch for another user by publishing a kind 31000 attestation signed by the active identity

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs signet-vouch 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 signet-vouch, this is the rule to start with:

signet-vouch Rate-limited

signet-vouch 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": {
    "signet-vouch": {
      "limits": [
        {
          "counter": "signet-vouch_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 signet-vouch call is checked against it from then on.

FAQ

Questions about signet-vouch

What does the signet-vouch tool do? +

Vouch for another user by publishing a kind 31000 attestation signed by the active identity. Use. 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 signet-vouch? +

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

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

Can I rate-limit signet-vouch? +

Yes. Add a rate_limit block to the signet-vouch 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 signet-vouch completely? +

Set action: deny in the PolicyLayer policy for signet-vouch. 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 signet-vouch? +

signet-vouch 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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