crow_tax_purge_return

THE RISK

Critical Risk

Why crow_tax_purge_return needs a policy

This tool irreversibly deletes sensitive financial data (tax returns). Destructive category applies because the action cannot be undone. Severity is high due to the sensitive nature of tax documents and the potential for data loss if triggered inappropriately; it is not critical since it targets a specific data type rather than system-wide infrastructure, and the action requires intentional invocation rather than…

From the tool's definition Tool description states 'Securely delete tax return data after filing' and explicitly notes 'This is irreversible.' The verb 'purge' in the tool name combined with 'delete' and 'irreversible' in the description clearly indicate permanent, non-recoverable data…

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

POLICY

How to control crow_tax_purge_return

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 crow_tax_purge_return:

policy.json

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

crow_tax_purge_return 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

Related tools and policies

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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 crow_tax_purge_return

What does the crow_tax_purge_return tool do? +

Securely delete tax return data after filing. This is irreversible. 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 crow_tax_purge_return? +

Register the Crow MCP server in PolicyLayer and add a rule for crow_tax_purge_return: 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 crow_tax_purge_return? +

crow_tax_purge_return 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 crow_tax_purge_return? +

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

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

crow_tax_purge_return 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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