marketplace-retire
Retire (delete) a service announcement by publishing a kind 5 deletion event. The service will no longer appear in discovery results.
This record as markdown: /tools/dev-forgesworn-bray/marketplace-retire.md
What marketplace-retire does on Nostr Bray
AI agents call marketplace-retire to permanently remove resources in Nostr Bray, typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
Why marketplace-retire is rated Critical
This tool irreversibly removes published service announcements from discovery. While scoped to the user's own announcements, an AI agent misusing this could delete important service listings, causing operational disruption and loss of visibility. The deletion is permanent (Nostr kind 5 is a cryptographic tombstone), making it Destructive rather than Write.
From the tool's definition The tool description explicitly states it will 'Retire (delete) a service announcement by publishing a kind 5 deletion event.' The use of 'delete' and the Nostr protocol's kind 5 event (which represents deletion/tombstoning) indicates irreversible removal of…
Attacks that exploit this kind of access
The rule that runs marketplace-retire 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 marketplace-retire, this is the rule to start with:
marketplace-retire is removed from the agent's tool list entirely, so the agent never calls it. The rest of the server keeps working.
The button opens the PolicyLayer dashboard: create your workspace, connect Nostr Bray, apply this rule, and every marketplace-retire call is checked against it from then on.
Questions about marketplace-retire
Retire (delete) a service announcement by publishing a kind 5 deletion event. The service will no longer appear in discovery results. It is categorised as a Destructive tool in the Nostr Bray MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Nostr Bray MCP server in PolicyLayer and add a rule for marketplace-retire: 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.
marketplace-retire is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the marketplace-retire 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 marketplace-retire. 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.
marketplace-retire 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.
More on Nostr Bray, and thousands of servers like it.
Across the catalogue