identity-switch

Switch the active Nostr identity. ALL subsequent tool calls will sign events and query relays as the new identity. Pass

SERVERNostr Bray SOURCEnostr-bray

High RISK CLASS

Category Execute

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/identity-switch.md

WHAT IT DOES

What identity-switch does on Nostr Bray

AI agents invoke identity-switch to trigger actions in Nostr Bray. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call: builds kicked off, notifications sent, workflows started.

RISK

Why identity-switch is rated High

This tool changes the active signing identity for all subsequent operations, meaning it doesn't merely read or write data but fundamentally alters the execution context of the agent. Misuse could allow an AI agent to impersonate another Nostr identity, sign events, send DMs, issue zaps, and perform any other operation as that identity.

From the tool's definition Switch the active Nostr identity. ALL subsequent tool calls will sign events and query relays as the new identity.

Attacks that exploit this kind of access

RECOMMENDED RULE

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

identity-switch Rate-limited

identity-switch stays usable, but rate-capped: a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "identity-switch": {
      "limits": [
        {
          "counter": "identity-switch_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-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 identity-switch call is checked against it from then on.

FAQ

Questions about identity-switch

What does the identity-switch tool do? +

Switch the active Nostr identity. ALL subsequent tool calls will sign events and query relays as the new identity. Pass. It is categorised as a Execute tool in the Nostr Bray MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on identity-switch? +

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

identity-switch is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit identity-switch? +

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

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

identity-switch 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.

KEEP EXPLORING

More on Nostr Bray, and thousands of servers like it.

This server

All 240 Nostr Bray tools → High-risk tools on this server →

Across the catalogue

All high-risk MCP tools → The MCP Attack Database →

Guides

Govern code and CI agents →Agent sandbox →Least privilege for MCP →