buy-stock · Zerodha Trading MCP: Risk & Policy

WHAT IT DOES

What buy-stock does on Zerodha Trading MCP

AI agents use buy-stock to commit financial operations through Zerodha Trading MCP — usually the final step of a payment, billing, or trading workflow. A call moves real money.

WHY IT NEEDS A POLICY

Why buy-stock needs a policy

This tool directly places real financial orders on a stock exchange, committing the user's funds to purchase securities. It falls squarely in the Financial category as it moves money and creates binding financial obligations.

From the tool's definition "Buy a stock on zerodha exchange for the user. It execute a real order for the user on the exchange"

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

buy-stock Approval-gated

Any call to buy-stock is blocked until a human approves it. The rest of the server keeps working.

View as policy code

policy.json

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

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Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Zerodha Trading MCP, so you can run agents against it safely.

FAQ

Questions about buy-stock

What does the buy-stock tool do? +

Buy a stock on zerodha exchange for the user. It execute a real order for the user on the exchange. It is categorised as a Financial tool in the Zerodha Trading MCP MCP Server, which means it involves financial transactions. Block by default and require explicit approval.

How do I enforce a policy on buy-stock? +

Register the Zerodha Trading MCP server in PolicyLayer and add a rule for buy-stock: 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 Zerodha Trading MCP. Nothing to install.

What risk level is buy-stock? +

buy-stock 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 buy-stock? +

Yes. Add a rate_limit block to the buy-stock 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 buy-stock completely? +

Set action: deny in the PolicyLayer policy for buy-stock. 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 buy-stock? +

buy-stock is provided by the Zerodha Trading MCP server (shubhamprajapati7748/zerodha-trade-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.