Cancel a running test and mark it as cancelled.
AI agents call cancel_run to permanently remove resources in Blop — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
Cancelling a running test is an irreversible action — once cancelled, the in-progress test execution is terminated and marked as cancelled, which cannot be undone. This falls under Destructive as the test run state is permanently altered and the execution cannot be resumed. Severity is medium because the blast radius is limited to test runs rather than production data or financial systems.
From the tool's definition Cancel a running test and mark it as cancelled
Attacks that exploit this kind of access
Cancel a running test and mark it as cancelled. It is categorised as a Destructive tool in the Blop MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Blop MCP server in PolicyLayer and add a rule for cancel_run: 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 Blop. Nothing to install.
cancel_run 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_run 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_run. 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_run is provided by the Blop MCP server (n2400813g/blop-mcp). 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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