Cancel a queued or running managed job.
AI agents call jobs_cancel to permanently remove resources in Run402 — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
Cancelling a job cannot be undone; any work in progress is lost and the job must be restarted from scratch. This is an irreversible termination of an active operation, placing it in the Destructive category. Severity is high because an AI agent misusing this tool could terminate critical infrastructure jobs, causing data loss or service disruption.
From the tool's definition 'Cancel a queued or running managed job' — cancelling a running job is an irreversible action that terminates execution and may lose in-progress work.
Attacks that exploit this kind of access
Cancel a queued or running managed job. It is categorised as a Destructive tool in the Run402 MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Run402 MCP server in PolicyLayer and add a rule for jobs_cancel: 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 Run402. Nothing to install.
jobs_cancel 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 jobs_cancel 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 jobs_cancel. 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.
jobs_cancel is provided by the Run402 MCP server (kychee-com/run402). 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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