Option Chain by Date

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

Annotations (readOnlyHint, idempotentHint, openWorldHint) already indicate a safe read operation. The description adds value by detailing the response structure (strikePrices with call/put fields including greeks), providing behavioral context beyond annotations.

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 with an inline return structure, no unnecessary words, efficiently conveying both purpose and output format.

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?

Although there is no output schema, the description compensates by including the return structure inline (strikePrices with call/put details). It covers the essential information an agent needs to understand the tool's output, though pagination or limits are not mentioned.

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?

Schema coverage is 100% with descriptive parameter names ('symbol', 'date') and descriptions ('Security symbol', 'Date (yyyy-mm-dd)'). The description does not add significant additional meaning beyond what the schema provides, so baseline is appropriate.

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 'Get option chain for an expiry date' with a specific verb and resource, and the returned structure with strikes and greeks distinguishes it from sibling tools like option_quote or option_volume.

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 an option chain for a specific expiry date but does not explicitly state when to use versus alternatives (e.g., option_chain_expiry_date_list or option_quote) or any exclusion criteria.

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