# handler-publish Publish a NIP-XX Machine Application Handler card (kind 31990) advertising MCP transport endpoints. Lets other agents and tools discover MCP servers on Nostr by the event kinds they support. Provide at least one of stdio_command or http_url. Agent View of the PolicyLayer registry record for `handler-publish`. HTML page: https://policylayer.com/tools/dev-forgesworn-bray/handler-publish ## Facts - Tool: `handler-publish` - Server: Nostr Bray (`nostr-bray`) — https://policylayer.com/tools/dev-forgesworn-bray.md - Install: `npx -y nostr-bray` - Homepage: https://github.com/forgesworn/bray - Risk category: Write (Medium risk) - Registry record: grade F, identity unverified - Server rate-limited: no - Parameters: 0 - Recommended policy verdict: Rate-limited ## Example call (MCP tools/call, JSON-RPC 2.0) ```json { "jsonrpc": "2.0", "id": 1, "method": "tools/call", "params": { "name": "handler-publish", "arguments": {} } } ``` ## Why handler-publish is rated Medium This tool creates and publishes metadata about MCP server endpoints on a distributed network. While the action modifies the network state, it is reversible and does not delete data or execute arbitrary code. The severity is medium because a compromised agent could advertise malicious MCP servers or inject false handler information, potentially directing other agents to untrusted endpoints. From the tool's own definition: "Tool description states: 'Publish a NIP-XX Machine Application Handler card (kind 31990)' — this creates and publishes a new event/record on the Nostr network." ## Use case AI agents use handler-publish 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. ## Recommended policy (PolicyLayer) Verdict: **Rate-limited**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Nostr Bray: ```json { "version": "1", "default": "deny", "tools": { "handler-publish": { "limits": [ { "counter": "handler-publish_rate", "window": "minute", "max": 30, "scope": "grant" } ] } } } ``` ## Other tools on Nostr Bray (239) - `blossom-delete` — Destructive — https://policylayer.com/tools/dev-forgesworn-bray/blossom-delete.md - `group-remove-user` — Destructive — https://policylayer.com/tools/dev-forgesworn-bray/group-remove-user.md - `label-remove` — Destructive — https://policylayer.com/tools/dev-forgesworn-bray/label-remove.md - `marketplace-credentials-clear` — Destructive — https://policylayer.com/tools/dev-forgesworn-bray/marketplace-credentials-clear.md - `marketplace-retire` — Destructive — https://policylayer.com/tools/dev-forgesworn-bray/marketplace-retire.md - `social-delete` — Destructive — https://policylayer.com/tools/dev-forgesworn-bray/social-delete.md - `tombstone` — Destructive — https://policylayer.com/tools/dev-forgesworn-bray/tombstone.md - `trust-revoke` — Destructive — https://policylayer.com/tools/dev-forgesworn-bray/trust-revoke.md - `vault-revoke` — Destructive — https://policylayer.com/tools/dev-forgesworn-bray/vault-revoke.md - `zap-wallet-clear` — Destructive — https://policylayer.com/tools/dev-forgesworn-bray/zap-wallet-clear.md - `cast-spell` — Execute — https://policylayer.com/tools/dev-forgesworn-bray/cast-spell.md - `execute-action` — Execute — https://policylayer.com/tools/dev-forgesworn-bray/execute-action.md - `identity-restore-shamir` — Execute — https://policylayer.com/tools/dev-forgesworn-bray/identity-restore-shamir.md - `identity-switch` — Execute — https://policylayer.com/tools/dev-forgesworn-bray/identity-switch.md - `marketplace-probe` — Execute — https://policylayer.com/tools/dev-forgesworn-bray/marketplace-probe.md - `nip44-encrypt` — Execute — https://policylayer.com/tools/dev-forgesworn-bray/nip44-encrypt.md - `onboard-verified` — Execute — https://policylayer.com/tools/dev-forgesworn-bray/onboard-verified.md - `relay-auth` — Execute — https://policylayer.com/tools/dev-forgesworn-bray/relay-auth.md - `trust-attest-chain` — Execute — https://policylayer.com/tools/dev-forgesworn-bray/trust-attest-chain.md - `trust-ring-lsag-sign` — Execute — https://policylayer.com/tools/dev-forgesworn-bray/trust-ring-lsag-sign.md - `trust-ring-prove` — Execute — https://policylayer.com/tools/dev-forgesworn-bray/trust-ring-prove.md - `trust-spoken-verify` — Execute — https://policylayer.com/tools/dev-forgesworn-bray/trust-spoken-verify.md - `vault-encrypt` — Execute — https://policylayer.com/tools/dev-forgesworn-bray/vault-encrypt.md - `marketplace-pay` — Financial — https://policylayer.com/tools/dev-forgesworn-bray/marketplace-pay.md - `zap-make-invoice` — Financial — https://policylayer.com/tools/dev-forgesworn-bray/zap-make-invoice.md - `zap-send` — Financial — https://policylayer.com/tools/dev-forgesworn-bray/zap-send.md - `article-list` — Read — https://policylayer.com/tools/dev-forgesworn-bray/article-list.md - `article-read` — Read — https://policylayer.com/tools/dev-forgesworn-bray/article-read.md - `badge-list` — Read — https://policylayer.com/tools/dev-forgesworn-bray/badge-list.md - `blossom-check` — Read — https://policylayer.com/tools/dev-forgesworn-bray/blossom-check.md - …and 209 more: https://policylayer.com/tools/dev-forgesworn-bray.md ## For agents This record is a snapshot. Live verdicts and the full registry: - Check every server in your MCP config at once: `npx -y policylayer stack` - Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md) - Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events` --- Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=dev-forgesworn-bray · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/dev-forgesworn-bray