canary-duress-signal

Generate a duress signal for a CANARY group. Returns the duress word (indistinguishable

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/canary-duress-signal.md

WHAT IT DOES

What canary-duress-signal does on Nostr Bray

AI agents call canary-duress-signal 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 canary-duress-signal is rated Low

Even though canary-duress-signal 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 canary-duress-signal 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 canary-duress-signal, this is the rule to start with:

canary-duress-signal Allowed

canary-duress-signal 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": {
    "canary-duress-signal": {}
  }
}

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 canary-duress-signal call is checked against it from then on.

FAQ

Questions about canary-duress-signal

What does the canary-duress-signal tool do? +

Generate a duress signal for a CANARY group. Returns the duress word (indistinguishable. 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 canary-duress-signal? +

Register the Nostr Bray MCP server in PolicyLayer and add a rule for canary-duress-signal: 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 canary-duress-signal? +

canary-duress-signal is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit canary-duress-signal? +

Yes. Add a rate_limit block to the canary-duress-signal 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 canary-duress-signal completely? +

Set action: deny in the PolicyLayer policy for canary-duress-signal. 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 canary-duress-signal? +

canary-duress-signal 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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