trust-attest-filter

Build a Nostr relay filter for attestation queries. Returns a filter object suitable for relay subscriptions. Supports filtering by type, subject, attestor, schema, and time range.

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/trust-attest-filter.md

WHAT IT DOES

What trust-attest-filter does on Nostr Bray

AI agents call trust-attest-filter 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 trust-attest-filter is rated Low

This tool constructs and returns a filter object for querying relay subscriptions. It does not submit data, execute commands, or modify state — it is purely a data retrieval/query builder that produces a filter for read-side operations. No side effects are described.

From the tool's definition Build a Nostr relay filter for attestation queries. Returns a filter object suitable for relay subscriptions.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs trust-attest-filter 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 trust-attest-filter, this is the rule to start with:

trust-attest-filter Allowed

trust-attest-filter 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": {
    "trust-attest-filter": {}
  }
}

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 trust-attest-filter call is checked against it from then on.

FAQ

Questions about trust-attest-filter

What does the trust-attest-filter tool do? +

Build a Nostr relay filter for attestation queries. Returns a filter object suitable for relay subscriptions. Supports filtering by type, subject, attestor, schema, and time range. 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 trust-attest-filter? +

Register the Nostr Bray MCP server in PolicyLayer and add a rule for trust-attest-filter: 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 trust-attest-filter? +

trust-attest-filter is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit trust-attest-filter? +

Yes. Add a rate_limit block to the trust-attest-filter 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 trust-attest-filter completely? +

Set action: deny in the PolicyLayer policy for trust-attest-filter. 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 trust-attest-filter? +

trust-attest-filter 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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