get_option_expiration_dates

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

With no annotations, the description should disclose behavioral traits. It only states it returns a list of OptionExpirationDate objects, but lacks details on rate limits, data freshness, error handling, or side effects. The docstring-style format adds minimal context beyond the schema.

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: three lines including the docstring. It is front-loaded with the purpose and avoids any superfluous information. Every word earns its place.

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 the tool's simplicity and the presence of an output schema, the description is reasonably complete. It specifies input and return type. However, it could be enhanced by describing how the expiration dates relate to other option tools.

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 description provides a docstring-style parameter description ('ticker (str): The symbol of the security'), which adds meaning beyond the schema's bare title and type. Since schema coverage is 0%, this description compensates adequately.

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 action ('Retrieve') and the resource ('available option expiration dates') with a specific input ('given ticker'). It differentiates from sibling tools like 'get_option_chain' which handle full chain data, and 'get_options_by_moneyness' which filter by moneyness.

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?

No explicit guidance on when to use this tool versus alternatives. It does not explain that this is a precursor to fetching option chains, nor does it contrast with sibling tools like 'get_call_options' or 'get_put_options'.

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