canary-duress-detect
Check if a spoken verification word is a duress signal.
This record as markdown: /tools/dev-forgesworn-bray/canary-duress-detect.md
What canary-duress-detect does on Nostr Bray
AI agents call canary-duress-detect 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.
Why canary-duress-detect is rated Low
This tool retrieves or evaluates information (whether a word is a duress signal) without modifying, executing commands, deleting, or committing financial obligations. It performs a lookup or pattern-matching operation against a verification system. The minimal blast radius even if misused is limited to information disclosure about duress detection logic.
From the tool's definition The tool 'canary-duress-detect' checks (queries) whether a spoken verification word matches a duress signal. The word 'check' and 'detect' indicate a read-only validation operation with no side effects on data or state.
Attacks that exploit this kind of access
The rule that runs canary-duress-detect 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-detect, this is the rule to start with:
canary-duress-detect is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Nostr Bray, apply this rule, and every canary-duress-detect call is checked against it from then on.
Questions about canary-duress-detect
Check if a spoken verification word is a duress signal. It is categorised as a Read tool in the Nostr Bray MCP Server, which means it retrieves data without modifying state.
Register the Nostr Bray MCP server in PolicyLayer and add a rule for canary-duress-detect: 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.
canary-duress-detect is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the canary-duress-detect 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.
Set action: deny in the PolicyLayer policy for canary-duress-detect. 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.
canary-duress-detect 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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