place_order

THE RISK

Critical Risk

Why place_order needs a policy

Despite the empty description, the tool name 'place_order' in the context of a trading platform (Fyers) that explicitly supports 'order placement' strongly indicates this tool places financial orders (buy/sell) in stock markets. This is a Financial category action with critical severity, as misuse could result in unintended financial transactions, significant monetary loss, or unauthorized trades.

From the tool's definition Tool name 'place_order' on a trading platform server described as enabling 'order placement' for Indian stock markets

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

POLICY

How to control place_order

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

policy.json

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

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

Create a free account and register Fyers MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

GATE THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Fyers MCP Server tools

Financial modify_order Modify an existing order. Destructive cancel_order Cancel an existing order. Execute authenticate Smart OAuth authentication - opens browser and captures redirect automatically. Read check_auth_status Check current authentication status. Read get_funds Get account funds information. Read get_holdings Get portfolio holdings. Read get_orders Get order history. Read get_positions Get current trading positions.

All 11 Fyers MCP Server tools →

Financial tools on other servers

0xarchive web3_subscribe Math MCP Server financial_calculator MCP Kling generate_video MCP Uber Server uber_request_ride

Go deeper

Critical-risk tools in Fyers MCP Server → 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 place_order

What does the place_order tool do? +

place_order. It is categorised as a Financial tool in the Fyers MCP Server MCP Server, which means it involves financial transactions. Block by default and require explicit approval.

How do I enforce a policy on place_order? +

Register the Fyers MCP Server MCP server in PolicyLayer and add a rule for place_order: 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 Fyers MCP Server. Nothing to install.

What risk level is place_order? +

place_order 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 place_order? +

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

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

place_order is provided by the Fyers MCP Server MCP server (quantabox/fyers-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Fyers MCP Server tool call.

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

CHECK YOUR STACK →