publish-event
Sign and publish a Nostr event with any kind, content, and tags. Use for custom or experimental event kinds not covered by dedicated tools.
This record as markdown: /tools/dev-forgesworn-bray/publish-event.md
What publish-event does on Nostr Bray
AI agents use publish-event 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 publish-event is rated Medium
This tool creates and broadcasts data (Nostr events) to a distributed network, making it a Write operation. Severity is high because publishing arbitrary content via an AI agent could be used for spam, impersonation, or spreading misinformation at scale; the trust-aware nature of the server (per server description) mitigates some risks but the raw capability to sign and publish any event type represents significant…
From the tool's definition Tool description explicitly states 'Sign and publish a Nostr event' which creates and publishes data to a Nostr network. The capability to publish 'any kind, content, and tags' indicates content creation with network-wide persistence.
Attacks that exploit this kind of access
The rule that runs publish-event 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 publish-event, this is the rule to start with:
publish-event 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 publish-event call is checked against it from then on.
Questions about publish-event
Sign and publish a Nostr event with any kind, content, and tags. Use for custom or experimental event kinds not covered by dedicated tools. 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 publish-event: 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.
publish-event 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 publish-event 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 publish-event. 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.
publish-event 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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