Get historical price data for multiple stock symbols
AI agents call get_historical_prices_multi to retrieve information from Yfnhanced 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 historical pricing information for multiple stocks. It has no side effects, does not modify data, execute code, delete anything, or commit financial transactions. It is a straightforward read operation retrieving market data from Yahoo Finance. The low severity reflects that financial data retrieval poses minimal risk even if called inappropriately by an agent.
From the tool's definition Tool name contains 'get_' and description states 'Get historical price data' - purely retrieves data without modification or execution.
Documented attack patterns abuse exactly the kind of access get_historical_prices_multi gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Yfnhanced, and nothing reaches the server without passing your rules. This is the rule we recommend for get_historical_prices_multi:
{
"version": "1",
"default": "deny",
"tools": {
"get_historical_prices_multi": {}
}
}get_historical_prices_multi is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get historical price data for multiple stock symbols. It is categorised as a Read tool in the Yfnhanced MCP Server, which means it retrieves data without modifying state.
Register the Yfnhanced MCP server in PolicyLayer and add a rule for get_historical_prices_multi: 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 Yfnhanced. Nothing to install.
get_historical_prices_multi 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_historical_prices_multi 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_historical_prices_multi. 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_historical_prices_multi is provided by the Yfnhanced MCP server (kanishka-namdeo/yfnhanced-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Yfnhanced, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
18 Yfnhanced tools catalogued and risk-classified — across an index of 43,000+ MCP servers.