runway_cancelTask

THE RISK

Critical Risk

Why runway_cancelTask needs a policy

This tool irreversibly removes or terminates a task, which fits the Destructive category definition. While not as severe as a cascade delete, canceling a task in a video generation context destroys the task record/state and prevents its completion. The blast radius is high because an AI agent could cancel critical generation jobs without authorization or verification, causing loss of work and wasted resources.

From the tool's definition Tool description states it 'Deletes or cancels a given task.' The verb 'deletes' combined with the irreversible nature of task cancellation indicates data destruction that cannot be undone.

Documented attack patterns abuse exactly the kind of access runway_cancelTask gives an agent:

POLICY

How to control runway_cancelTask

PolicyLayer is an MCP gateway — it sits between your AI agents and Runway API MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for runway_cancelTask:

policy.json

{
  "version": "1",
  "default": "deny",
  "hide": [
    "runway_cancelTask"
  ]
}

runway_cancelTask disappears from the agent's tool list entirely, and any attempt to call it is denied. The rest of the server keeps working.

Create a free account and register Runway API MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

RESTRICT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Runway API MCP Server tools

Execute runway_editVideo Edit a video using Runway Aleph. promptText is a prompt for the video. videoUri takes in a Execute runway_generateVideo Generate a video from an image and a text prompt. Accepted ratios are 1280:720, 720:1280, Write runway_generateImage Generate an image from a text prompt and optional reference images. Available ratios are 1 Write runway_upscaleVideo Upscale a video to a higher resolution. videoUri takes in a url of a video or a data uri o Read runway_getOrg Returns details like credit balance, usage details, and organization information. Read runway_getTask Get the details of a task, if the task status is

All 7 Runway API MCP Server tools →

Destructive tools on other servers

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Go deeper

Critical-risk tools in Runway API MCP Server → Every critical-risk tool this server exposes, in one view.
All critical-risk MCP tools → Every critical-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Blast radius → How much damage one compromised or confused agent can do — and how to bound it.
Tool call approval → Approval gates on individual tool calls: auto-allow, prompt, or deny.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about runway_cancelTask

What does the runway_cancelTask tool do? +

Deletes or cancels a given task. It is categorised as a Destructive tool in the Runway API MCP Server MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.

How do I enforce a policy on runway_cancelTask? +

Register the Runway API MCP Server MCP server in PolicyLayer and add a rule for runway_cancelTask: 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 Runway API MCP Server. Nothing to install.

What risk level is runway_cancelTask? +

runway_cancelTask is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.

Can I rate-limit runway_cancelTask? +

Yes. Add a rate_limit block to the runway_cancelTask 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.

How do I block runway_cancelTask completely? +

Set action: deny in the PolicyLayer policy for runway_cancelTask. 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.

What MCP server provides runway_cancelTask? +

runway_cancelTask is provided by the Runway API MCP Server MCP server (runwayml/runway-api-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Runway API MCP Server tool call.

Start from Runway API MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →