trust-attest-chain
Follow endorsement references to build a transitive trust chain. Starting from a subject, queries attestations about that subject, then follows each attestor as a new subject up to maxDepth. Returns the full chain with validity status for each link.
This record as markdown: /tools/dev-forgesworn-bray/trust-attest-chain.md
What trust-attest-chain does on Nostr Bray
AI agents invoke trust-attest-chain to trigger actions in Nostr Bray. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call: builds kicked off, notifications sent, workflows started.
Why trust-attest-chain is rated High
This tool executes a multi-step algorithmic operation (transitive trust chain construction) with branching logic that depends on external attestation data. While it retrieves data (Read-like), the core function is executing a graph traversal algorithm with conditional logic to build transitive trust chains.
From the tool's definition The tool "follow[s] endorsement references", "queries attestations", and "follows each attestor as a new subject up to maxDepth", performing complex graph traversal with conditional branching based on attestation data.
Attacks that exploit this kind of access
The rule that runs trust-attest-chain 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-chain, this is the rule to start with:
trust-attest-chain stays usable, but rate-capped: a runaway agent can't fire it dozens of times 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 trust-attest-chain call is checked against it from then on.
Questions about trust-attest-chain
Follow endorsement references to build a transitive trust chain. Starting from a subject, queries attestations about that subject, then follows each attestor as a new subject up to maxDepth. Returns the full chain with validity status for each link. It is categorised as a Execute tool in the Nostr Bray MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Nostr Bray MCP server in PolicyLayer and add a rule for trust-attest-chain: 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.
trust-attest-chain is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the trust-attest-chain 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 trust-attest-chain. 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.
trust-attest-chain 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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