AI agents call delete-quiz to permanently remove resources in Canvas MCP Server — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
Deleting a quiz is a destructive action that cannot be undone and results in permanent loss of assessment data, quiz questions, and associated student responses. This falls clearly into the Destructive category rather than Execute, as the action itself (not just its effects) is inherently irreversible.
From the tool's definition Tool name 'delete-quiz' explicitly indicates deletion of a quiz, which is an irreversible operation. Description states 'Delete a quiz from a course,' confirming permanent removal of educational content.
Documented attack patterns abuse exactly the kind of access delete-quiz gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Canvas MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for delete-quiz:
{
"version": "1",
"default": "deny",
"hide": [
"delete-quiz"
]
}delete-quiz disappears from the agent's tool list entirely, and any attempt to call it is denied. The rest of the server keeps working.
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Delete a quiz from a course. It is categorised as a Destructive tool in the Canvas MCP Server MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Canvas MCP Server MCP server in PolicyLayer and add a rule for delete-quiz: 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 Canvas MCP Server. Nothing to install.
delete-quiz 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 delete-quiz 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 delete-quiz. 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.
delete-quiz is provided by the Canvas MCP Server MCP server (r-huijts/canvas-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Canvas MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
50 Canvas MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.