tombstone
Overwrite an addressable event (kind 30000-39999) with empty content, effectively deleting it from relays. Use this to clean up broken or stale replaceable events.
This record as markdown: /tools/dev-forgesworn-bray/tombstone.md
What tombstone does on Nostr Bray
AI agents call tombstone 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 tombstone is rated Critical
The tool irreversibly overwrites Nostr addressable events with empty content, which effectively deletes them from relays. This is a destructive action that cannot be undone — once the tombstone event is broadcast and relays replace the original, the data is gone.
From the tool's definition Overwrite an addressable event with empty content, effectively deleting it from relays. Use this to clean up broken or stale replaceable events.
Attacks that exploit this kind of access
The rule that runs tombstone 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 tombstone, this is the rule to start with:
tombstone 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 tombstone call is checked against it from then on.
Questions about tombstone
Overwrite an addressable event (kind 30000-39999) with empty content, effectively deleting it from relays. Use this to clean up broken or stale replaceable events. 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 tombstone: 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.
tombstone 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 tombstone 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 tombstone. 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.
tombstone 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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