canary-beacon-check

Check a CANARY beacon\

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-beacon-check.md

WHAT IT DOES

What canary-beacon-check does on Nostr Bray

AI agents call canary-beacon-check 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-beacon-check is rated Low

This tool retrieves or inspects the status/state of a CANARY beacon without creating, modifying, deleting, or executing arbitrary operations. It is a read-only query operation with minimal blast radius if misused by an AI agent.

From the tool's definition Tool name includes 'check' and description states 'Check a CANARY beacon' — a query/inspection operation with no modification, deletion, or execution of external code.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs canary-beacon-check 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-beacon-check, this is the rule to start with:

canary-beacon-check Allowed

canary-beacon-check 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-beacon-check": {}
  }
}

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-beacon-check call is checked against it from then on.

FAQ

Questions about canary-beacon-check

What does the canary-beacon-check tool do? +

Check a CANARY beacon\. 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-beacon-check? +

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

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

Can I rate-limit canary-beacon-check? +

Yes. Add a rate_limit block to the canary-beacon-check 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-beacon-check completely? +

Set action: deny in the PolicyLayer policy for canary-beacon-check. 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-beacon-check? +

canary-beacon-check 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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