Get IV rank for a ticker
AI agents call get_stock_iv_rank to retrieve information from Unusual Whales MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves financial data (IV rank metric for a stock ticker) without side effects. It performs a simple query/fetch operation typical of market data APIs. While the Unusual Whales server provides financial data, accessing historical or real-time metrics for analysis purposes is a Read operation.
From the tool's definition Tool name 'get_stock_iv_rank' and description 'Get IV rank for a ticker' indicate a data retrieval operation. IV rank (implied volatility rank) is a read-only market metric. No modification, deletion, execution, or financial transaction occurs.
Attacks that exploit this kind of access
Get IV rank for a ticker. It is categorised as a Read tool in the Unusual Whales MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Unusual Whales MCP Server MCP server in PolicyLayer and add a rule for get_stock_iv_rank: 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 Unusual Whales MCP Server. Nothing to install.
get_stock_iv_rank 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_stock_iv_rank 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_stock_iv_rank. 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_stock_iv_rank is provided by the Unusual Whales MCP Server MCP server (phields/unusualwhales-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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