get_option_chain

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

With no annotations provided, the description must fully convey behavioral traits. It only mentions read operation implicitly and date constraints, but lacks details on side effects, authorization needs, rate limits, or response format. This is insufficient for an option chain tool.

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 extremely concise, using two sentences to convey purpose and constraints. It front-loads the action and avoids unnecessary words, making it efficient for agent processing.

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?

Given no output schema and no annotations, the description is the sole source of context. It does not explain what the returned option chain contains (e.g., strikes, calls/puts) or any pagination. Missing critical details for a complete understanding.

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 description coverage is 0%, so the description must compensate. It explains that start/end are date filters in YYYY-MM-DD format, adding meaning beyond the schema. However, the underlying parameter is not explained (e.g., expected ticker format), leaving a gap.

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 underlying', specifying the action and resource. It distinguishes itself from sibling tools like get_option_expiration_date and get_option_quote by focusing on the full chain.

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 limits usage to 'HK/US stocks/ETF/index only', providing a clear context. It mentions optional date filtering via start/end, which guides proper invocation. However, it does not explicitly state when not to use this tool or suggest alternatives.

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