Get stocks with the largest price drops (top losers)
AI agents call get_market_losers to retrieve information from Financial Modeling Prep (FMP) MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool fetches a list of stocks that have experienced the largest price decreases. It is a pure read/query operation against market data with no writes, executions, or financial transactions involved. Misuse potential is minimal as it only returns publicly available market information.
From the tool's definition "Get stocks with the largest price drops (top losers)" — retrieves/queries market data with no side effects
Attacks that exploit this kind of access
Get stocks with the largest price drops (top losers). It is categorised as a Read tool in the Financial Modeling Prep (FMP) MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Financial Modeling Prep (FMP) MCP Server MCP server in PolicyLayer and add a rule for get_market_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 Financial Modeling Prep (FMP) MCP Server. Nothing to install.
get_market_losers is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the get_market_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.
Set action: deny in the PolicyLayer policy for get_market_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.
get_market_losers is provided by the Financial Modeling Prep (FMP) MCP Server MCP server (jackdark425/aigroup-fmp-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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