get_top_losers

获取今日跌幅榜

SERVERYahoo Finance MCP Server SOURCE16coffee/finance-mcp

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade A, identity unverified Pull the record →

This record as markdown: /tools/16coffee-finance-mcp/get-top-losers.md

WHAT IT DOES

What get_top_losers does on Yahoo Finance MCP Server

AI agents call get_top_losers to retrieve information from Yahoo Finance MCP Server without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why get_top_losers is rated Low

This is a read-only query function that fetches and returns financial market data. It performs no creation, modification, deletion, or execution of code/commands, and involves no financial transactions or money movement. The user is simply retrieving publicly available market information about stock performance rankings.

From the tool's definition Tool name is 'get_top_losers' and description translates to 'Get today's decline/loss rankings'. This retrieves market data (stocks with largest percentage losses) without any side effects.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs get_top_losers safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Yahoo Finance MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For get_top_losers, this is the rule to start with:

get_top_losers Allowed

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

View as policy code

policy.json

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

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Yahoo Finance MCP Server, apply this rule, and every get_top_losers call is checked against it from then on.

FAQ

Questions about get_top_losers

What does the get_top_losers tool do? +

获取今日跌幅榜. It is categorised as a Read tool in the Yahoo Finance MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_top_losers? +

Register the Yahoo Finance 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 Yahoo Finance 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 Yahoo Finance MCP Server MCP server (16coffee/finance-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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