get_top_losers

THE RISK

Low Risk

Why get_top_losers needs a policy

This tool only retrieves and displays market data; it has no side effects, cannot modify state, cannot execute operations, and cannot commit financial transactions. Even if an AI agent misuses it by repeatedly querying, the worst case is excessive API calls. The information is real-time but read-only, making it a straightforward Read category with low risk.

From the tool's definition Tool retrieves 'top 10 losing stocks' with 'current trading day' data from the CSE. The description indicates a query/retrieval operation with no capability to modify, execute code, delete, or move financial assets.

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

POLICY

How to control get_top_losers

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

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "get_top_losers": {}
  }
}

get_top_losers is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register CSE 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.

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More CSE MCP Server tools

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about get_top_losers

What does the get_top_losers tool do? +

Get the top 10 losing stocks in the CSE for the current trading day. It is categorised as a Read tool in the CSE MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_top_losers? +

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

What risk level is get_top_losers? +

get_top_losers is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit get_top_losers? +

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

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

get_top_losers is provided by the CSE MCP Server MCP server (shaveen12/cse-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every CSE MCP Server tool call.

Start from CSE 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 →