set_nostr_identity

Set a Nostr identity for the agent. Stores the private key and derives the public key. REQUIRES AGENT KEY.

SERVERLightning Wallet SOURCElightning-wallet-mcp

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/io-github-lightningfaucet-lightning-wallet-mcp/set-nostr-identity.md

WHAT IT DOES

What set_nostr_identity does on Lightning Wallet

AI agents use set_nostr_identity to create or update resources in Lightning Wallet, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Lightning Wallet environment.

RISK

Why set_nostr_identity is rated Medium

This tool creates and modifies identity data (Nostr private/public key pair) in persistent storage. While it doesn't directly move money, it establishes cryptographic credentials that could authorize subsequent financial transactions on the Lightning Wallet server.

From the tool's definition Tool "stores the private key" and "derives the public key", indicating it creates and persists cryptographic identity material. The requirement for AGENT KEY suggests credential management.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs set_nostr_identity safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Lightning Wallet, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For set_nostr_identity, this is the rule to start with:

set_nostr_identity Rate-limited

set_nostr_identity 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": {
    "set_nostr_identity": {
      "limits": [
        {
          "counter": "set_nostr_identity_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 Lightning Wallet, apply this rule, and every set_nostr_identity call is checked against it from then on.

FAQ

Questions about set_nostr_identity

What does the set_nostr_identity tool do? +

Set a Nostr identity for the agent. Stores the private key and derives the public key. REQUIRES AGENT KEY. It is categorised as a Write tool in the Lightning Wallet MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on set_nostr_identity? +

Register the Lightning Wallet MCP server in PolicyLayer and add a rule for set_nostr_identity: 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 Lightning Wallet. Nothing to install.

What risk level is set_nostr_identity? +

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

Can I rate-limit set_nostr_identity? +

Yes. Add a rate_limit block to the set_nostr_identity 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 set_nostr_identity completely? +

Set action: deny in the PolicyLayer policy for set_nostr_identity. 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 set_nostr_identity? +

set_nostr_identity is provided by the Lightning Wallet MCP server (lightning-wallet-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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