mcp-financex

get_implied_volatility

Retrieve implied volatility data for any stock to assess market expectations of future price movements and compare with historical volatility for trading insights.

Instructions

Get implied volatility (IV) data for a stock. IV represents market expectations of future volatility. Compare IV to historical volatility to identify high or low volatility environments. Returns current IV, IV by expiration, and comparison with historical volatility.

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "symbol": "<symbol>"
    },
    "name": "get_implied_volatility"
  }
}

Input Schema

Name	Required	Description	Default
`symbol`	Yes	Stock ticker symbol

Schema Changelog

Changes observed during successful MCP inspections.

First observedv1.0.11Jul 5, 2026

TDQS

A4/5.0

Behavior4/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations provided, so description carries full burden. It discloses that the tool returns current IV, IV by expiration, and comparison with historical volatility, which informs the agent of output content. However, it does not mention any side effects or permission requirements.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Three sentences, front-loaded with purpose, no wasted words. Efficient and clear.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a simple tool with one parameter and no output schema, the description adequately explains the concept of IV, its use, and what data is returned. It covers the essential information, though it could be slightly more detailed about the output structure.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Only one parameter (symbol) with 100% schema coverage. The schema already describes it as a stock ticker symbol, and the description adds no additional meaning or constraints beyond that.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

Clearly states the tool gets implied volatility data for a stock, specifying the verb (get) and resource (IV data). Distinguishes from sibling tools like calculate_historical_volatility.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines3/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Mentions comparing IV to historical volatility to identify high/low volatility environments, but does not explicitly state when to use this tool versus siblings like calculate_historical_volatility or calculate_greeks, nor does it provide when-not guidance.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.