privacy-commit
Create a Pedersen commitment to a secret value. Returns a public commitment point (safe to share) and a blinding factor (keep secret). The commitment cryptographically binds you to the value without revealing it.
This record as markdown: /tools/dev-forgesworn-bray/privacy-commit.md
What privacy-commit does on Nostr Bray
AI agents use privacy-commit to create or update resources in Nostr Bray, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Nostr Bray environment.
Why privacy-commit is rated Medium
This tool generates cryptographic commitments—new data structures that are written/stored as output. It is not destructive (nothing is deleted or overwritten), not financial (no money moves), and not execute-like (it performs a well-defined cryptographic operation, not arbitrary code execution). The operation is reversible in principle (commitments can be discarded).
From the tool's definition Tool creates and returns a Pedersen commitment (public commitment point and blinding factor), which is a cryptographic object that did not exist before. The description states "Create a Pedersen commitment" which is an act of generating and storing new data.
Attacks that exploit this kind of access
The rule that runs privacy-commit 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-commit, this is the rule to start with:
privacy-commit stays usable, but capped: an agent stuck in a loop can't make hundreds of changes a minute. 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-commit call is checked against it from then on.
Questions about privacy-commit
Create a Pedersen commitment to a secret value. Returns a public commitment point (safe to share) and a blinding factor (keep secret). The commitment cryptographically binds you to the value without revealing it. It is categorised as a Write tool in the Nostr Bray MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Nostr Bray MCP server in PolicyLayer and add a rule for privacy-commit: 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-commit is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the privacy-commit 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-commit. 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-commit 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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