// MCP TOOL REFERENCE

crow_tax_prepare_from_documents

ServerCrow
CategoryFinancial

How to control crow_tax_prepare_from_documents ↓

WHAT IT DOES

What crow_tax_prepare_from_documents does on Crow

AI agents use crow_tax_prepare_from_documents to commit financial operations through Crow — usually the final step of a payment, billing, or trading workflow. A call moves real money.

THE RISK

Critical Risk

Why crow_tax_prepare_from_documents needs a policy

This tool prepares tax returns using sensitive financial and personal identity documents (SSNs, W-2s, 1099s), directly committing to financial filings with legal and monetary consequences. Misuse could result in incorrect tax submissions, identity exposure, or fraudulent filings — making this a Financial category tool with critical severity.

From the tool's definition tax return preparation...creates a return from ALL confirmed documents...W-2s, 1099s, 1098s, and calculates...SSNs and names are auto-filled

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

POLICY

How to control crow_tax_prepare_from_documents

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_prepare_from_documents:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "crow_tax_prepare_from_documents": {
      "deny_if": [
        {
          "conditions": [],
          "on_deny": "Requires human approval."
        }
      ]
    }
  }
}

Any call to crow_tax_prepare_from_documents is blocked until a human approves it. 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.

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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.
Human-in-the-loop → When a tool call should wait for a person — and when policy can decide alone.
Tool call approval → Approval gates on individual tool calls: auto-allow, prompt, or deny.
How to Add Spending Controls to Any MCP Agent →
Rate Limiting MCP Tool Calls: A Practical Guide →

FAQ

Questions about crow_tax_prepare_from_documents

What does the crow_tax_prepare_from_documents tool do? +

One-step tax return preparation: creates a return from ALL confirmed documents uploaded through the Tax Filing panel. Automatically adds W-2s, 1099s, 1098s, and calculates. SSNs and names are auto-filled from W-2 documents when available — only ask the user for filing_status and tax_year. It is categorised as a Financial tool in the Crow MCP Server, which means it involves financial transactions. Block by default and require explicit approval.

How do I enforce a policy on crow_tax_prepare_from_documents? +

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

crow_tax_prepare_from_documents is a Financial 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_prepare_from_documents? +

Yes. Add a rate_limit block to the crow_tax_prepare_from_documents 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_prepare_from_documents completely? +

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

crow_tax_prepare_from_documents 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.