identity-derive-persona

Derive a named persona (e.g.

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/identity-derive-persona.md

WHAT IT DOES

What identity-derive-persona does on Nostr Bray

AI agents call identity-derive-persona 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 identity-derive-persona is rated Low

Even though identity-derive-persona only reads data, uncontrolled read access leaks sensitive information and racks up API costs: an agent caught in a retry loop can make thousands of calls a minute without anyone noticing.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs identity-derive-persona 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 identity-derive-persona, this is the rule to start with:

identity-derive-persona Allowed

identity-derive-persona 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": {
    "identity-derive-persona": {}
  }
}

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 identity-derive-persona call is checked against it from then on.

FAQ

Questions about identity-derive-persona

What does the identity-derive-persona tool do? +

Derive a named persona (e.g. 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 identity-derive-persona? +

Register the Nostr Bray MCP server in PolicyLayer and add a rule for identity-derive-persona: 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 identity-derive-persona? +

identity-derive-persona is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit identity-derive-persona? +

Yes. Add a rate_limit block to the identity-derive-persona 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 identity-derive-persona completely? +

Set action: deny in the PolicyLayer policy for identity-derive-persona. 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 identity-derive-persona? +

identity-derive-persona 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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