// MCP TOOL REFERENCE

maker_delete_learner

Permanently delete a learner and cascade to sessions, transcripts, memories, and storage references. Tier-1 destructive action — admin confirms in panel before calling.

ServerCrow
CategoryDestructive

How to control maker_delete_learner ↓

WHAT IT DOES

What maker_delete_learner does on Crow

AI agents call maker_delete_learner to permanently remove resources in Crow — typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.

THE RISK

Critical Risk

Why maker_delete_learner needs a policy

This tool irreversibly deletes data (learner records and all associated sessions, transcripts, memories, storage references) with no undo capability. The cascade deletion of dependent entities increases the blast radius. The phrase 'Tier-1 destructive action' confirms the developer's own severity assessment. Permanent deletion is the definition of Destructive category, superseding Write (which is reversible).

From the tool's definition "Permanently delete a learner and cascade to sessions, transcripts, memories, and storage references. Tier-1 destructive action" — explicitly states permanent deletion across multiple data entities with cascade effects.

Risk signalsAdmin/system-level operation

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

POLICY

How to control maker_delete_learner

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

policy.json

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

maker_delete_learner 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 Crow — 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 →

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EXPLORE

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Go deeper

Critical-risk tools in Crow → 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 maker_delete_learner

What does the maker_delete_learner tool do? +

Permanently delete a learner and cascade to sessions, transcripts, memories, and storage references. Tier-1 destructive action — admin confirms in panel before calling. It is categorised as a Destructive tool in the Crow 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 maker_delete_learner? +

Register the Crow MCP server in PolicyLayer and add a rule for maker_delete_learner: 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 Crow. Nothing to install.

What risk level is maker_delete_learner? +

maker_delete_learner 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 maker_delete_learner? +

Yes. Add a rate_limit block to the maker_delete_learner 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 maker_delete_learner completely? +

Set action: deny in the PolicyLayer policy for maker_delete_learner. 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 maker_delete_learner? +

maker_delete_learner is provided by the Crow MCP server (kh0pper/crow). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Crow tool call.

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

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576 Crow tools catalogued and risk-classified — across an index of 43,000+ MCP servers.