privacy-prove-threshold
Prove a value exceeds a threshold without revealing the exact value. Useful for income verification, balance checks, credit scoring. The proof shows value >= threshold.
This record as markdown: /tools/dev-forgesworn-bray/privacy-prove-threshold.md
What privacy-prove-threshold does on Nostr Bray
AI agents call privacy-prove-threshold 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 privacy-prove-threshold is rated Low
This tool retrieves or derives information (a proof of threshold) without creating, modifying, deleting, or executing arbitrary operations. It is purely informational—generating a zero-knowledge-style proof for verification purposes. The absence of any mutation, deletion, or external execution makes it a Read operation.
From the tool's definition Tool generates a cryptographic proof to verify a threshold condition (value >= threshold) without revealing the underlying value. It performs a query or attestation operation with no side effects on data.
Attacks that exploit this kind of access
The rule that runs privacy-prove-threshold 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 privacy-prove-threshold, this is the rule to start with:
privacy-prove-threshold 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 privacy-prove-threshold call is checked against it from then on.
Questions about privacy-prove-threshold
Prove a value exceeds a threshold without revealing the exact value. Useful for income verification, balance checks, credit scoring. The proof shows value >= threshold. 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 privacy-prove-threshold: 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.
privacy-prove-threshold 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 privacy-prove-threshold 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 privacy-prove-threshold. 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.
privacy-prove-threshold 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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