cancel_print
AI agents call cancel_print to permanently remove resources in Kiln — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
Cancelling a 3D print is an irreversible action — it stops an in-progress print job, discards all progress, and typically cannot be undone. The partially printed object is wasted along with the print time and materials already consumed. This fits the Destructive category (irreversible operation).
From the tool's definition Tool name 'cancel_print' on a 3D printer control server; description is empty and uninformative.
Attacks that exploit this kind of access
cancel_print. It is categorised as a Destructive tool in the Kiln MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Kiln MCP server in PolicyLayer and add a rule for cancel_print: 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 Kiln. Nothing to install.
cancel_print 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 cancel_print 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 cancel_print. 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.
cancel_print is provided by the Kiln MCP server (codeofaxel/Kiln). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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