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Open-Agent-Tools

Open Stocks MCP

find_options

Search for tradable stock options by ticker symbol, with optional filters for expiration date and option type.

Instructions

Finds tradable options with optional filtering.

Args:
    symbol: Stock ticker symbol (e.g., "AAPL")
    expiration_date: Optional expiration date in YYYY-MM-DD format
    option_type: Optional option type ("call" or "put")

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
symbolYes
expiration_dateNo
option_typeNo

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Behavior2/5

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

No annotations are provided, and the description does not disclose behavioral traits such as data source, freshness, or limitations (e.g., whether it searches only tradable options from user's broker). This is a significant gap.

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?

The description is extremely concise, with a clear front-loaded purpose and succinct parameter list. Every sentence adds value without redundancy.

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

Completeness3/5

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

The description covers the basics but lacks details on return value (though output schema exists), common pitfalls, or how filtering works. For a tool with 3 optional parameters, it is minimally adequate.

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

Parameters4/5

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

With 0% schema description coverage, the description adds meaning by explaining each parameter: symbol as ticker, expiration_date in YYYY-MM-DD, and option_type as 'call' or 'put'. This is helpful and goes beyond the bare schema.

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

Purpose4/5

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

The description clearly states the tool finds tradable options with optional filtering, specifying the three parameters. However, it does not distinguish this from similar sibling tools like 'options_chains' or 'option_market_data'.

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

Usage Guidelines2/5

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

No guidance is provided on when to use this tool over alternatives. Among many option-related tools, the agent has no basis to choose this one.

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

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