crow_tax_set_capital_gains

THE RISK

Critical Risk

Why crow_tax_set_capital_gains needs a policy

This tool modifies financial tax records by adding capital gain/loss transactions to Schedule D, which is a formal financial/tax document. Recording incorrect or malicious capital gain/loss data could have significant financial and legal consequences, placing it firmly in the Financial category with high severity.

From the tool's definition 'Add Schedule D capital gain/loss transactions' — directly records financial tax transactions related to capital gains and losses

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

POLICY

How to control crow_tax_set_capital_gains

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_set_capital_gains:

policy.json

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

Any call to crow_tax_set_capital_gains 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_set_capital_gains

What does the crow_tax_set_capital_gains tool do? +

Add Schedule D capital gain/loss transactions. 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_set_capital_gains? +

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

crow_tax_set_capital_gains 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_set_capital_gains? +

Yes. Add a rate_limit block to the crow_tax_set_capital_gains 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_set_capital_gains completely? +

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

crow_tax_set_capital_gains 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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