yahoo_finance_ticker_options_expiration

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

No annotations are provided, so the description carries the full burden. It discloses that the tool returns calls and puts and requires a Unix expiration timestamp, but does not mention error handling, data freshness, or required permissions. This is adequate for a simple read-only tool but lacks depth.

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

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

The description is a single sentence that is front-loaded and contains no unnecessary words. It efficiently conveys the essential information.

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

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

For a simple tool with two parameters and no output schema, the description adequately explains what it does and what it returns. It could mention that it returns a list of option contracts, but the phrase 'options chain' implies this. It is sufficiently complete for an agent to understand its purpose.

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

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

The input schema covers 100% of parameters with descriptions. The description adds that it returns calls and puts, which is contextual but does not add new parameter-specific meaning beyond what the schema already provides ('symbol' and 'Unix expiration timestamp').

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

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

The description clearly states the verb ('returns'), the resource ('options chain by expiration'), and the output ('calls and puts'). It distinguishes from sibling tools like yahoo_finance_ticker_options by specifying 'by expiration' with a specific Unix timestamp.

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

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

The description implies usage for retrieving options for a specific expiration date but does not explicitly state when to use this tool versus alternatives like yahoo_finance_ticker_options (which may return all options). No when-not-to-use or alternative guidance is provided.

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