cancel_model_download
AI agents call cancel_model_download to permanently remove resources in Web Gui — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
An AI agent that decides to call cancel_model_download doesn't hesitate, doesn't double-check, and doesn't stop at one. Whatever it removes from Web Gui is gone — there is no undo for destructive operations.
Attacks that exploit this kind of access
cancel_model_download. It is categorised as a Destructive tool in the Web Gui MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Web Gui MCP server in PolicyLayer and add a rule for cancel_model_download: 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 Web Gui. Nothing to install.
cancel_model_download 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_model_download 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_model_download. 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_model_download is provided by the Web Gui MCP server (thehzuo/gui-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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