Get stocks with the largest price increases (top gainers)
AI agents call get_market_gainers 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 queries and returns financial market data (top gainer stocks) without creating, modifying, deleting, or executing any operations. It presents no risk of unintended financial transactions, code execution, or data destruction. The low severity reflects that misuse would only result in accessing publicly available market information.
From the tool's definition Tool retrieves stock data ('Get stocks with the largest price increases') with no modifications or side effects. The verb 'Get' and the read-only nature of fetching market data indicate a pure data retrieval operation.
Attacks that exploit this kind of access
Get stocks with the largest price increases (top gainers). 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_gainers: 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_gainers 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_gainers 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_gainers. 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_gainers 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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