Spawn a child agent under this agent's identity. The child inherits lineage from the parent. Returns the child's hash and API key. Requires sufficient beats balance or a work-proof receipt.
Part of the Provenonce server.
Free to start. No card required.
AI agents call provenonce_spawn to retrieve information from Provenonce without modifying any data. This is common in research, monitoring, and reporting workflows where the agent needs context before taking action. Because read operations don't change state, they are generally safe to allow without restrictions -- but you may still want rate limits to control API costs.
Even though provenonce_spawn only reads data, uncontrolled read access can leak sensitive information or rack up API costs. An agent caught in a retry loop could make thousands of calls per minute. A rate limit gives you a safety net without blocking legitimate use.
Read-only tools are safe to allow by default. No rate limit needed unless you want to control costs.
{
"version": "1",
"default": "deny",
"tools": {
"provenonce_spawn": {}
}
}See the full Provenonce policy for all 11 tools.
These attack patterns abuse exactly the kind of access provenonce_spawn gives an agent. Each links to the full case and the policy that stops it:
Other read tools across the catalogue. The same approach applies to each: allow, with a rate cap to control cost.
Spawn a child agent under this agent's identity. The child inherits lineage from the parent. Returns the child's hash and API key. Requires sufficient beats balance or a work-proof receipt.. It is categorised as a Read tool in the Provenonce MCP Server, which means it retrieves data without modifying state.
Register the Provenonce MCP server in PolicyLayer and add a rule for provenonce_spawn: 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 Provenonce. Nothing to install.
provenonce_spawn is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the provenonce_spawn 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 provenonce_spawn. 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.
provenonce_spawn is provided by the Provenonce MCP server (@provenonce/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 11 Provenonce tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
4,600+ MCP servers and 31,000+ tools scanned and risk-classified.