Cancel a queued/scheduled task. Idempotent — if the task is already completed/failed/cancelled this returns the existing status without error. Throws only if task_id is unknown.
AI agents call cancel_task to permanently remove resources in Ebb Ai — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
Cancelling a scheduled task is irreversible in the sense that the scheduled execution slot is lost and the task will not run as planned. While the operation is idempotent and won't error on already-terminal states, cancelling a queued task permanently stops it from executing, which cannot be undone (you'd have to re-schedule it).
From the tool's definition Cancel a queued/scheduled task... if the task is already completed/failed/cancelled this returns the existing status without error. Throws only if task_id is unknown.
Attacks that exploit this kind of access
Cancel a queued/scheduled task. Idempotent — if the task is already completed/failed/cancelled this returns the existing status without error. Throws only if task_id is unknown. It is categorised as a Destructive tool in the Ebb Ai MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Ebb Ai MCP server in PolicyLayer and add a rule for cancel_task: 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 Ebb Ai. Nothing to install.
cancel_task 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_task 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_task. 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_task is provided by the Ebb Ai MCP server (vitalini/ebb-ai). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
cancel_task is one line of Ebb Ai's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
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