get_segment_financials

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

No annotations are provided, so the description carries the behavioral disclosure burden. It correctly indicates a read-only retrieve operation and notes that data follows reported business segments, but it does not mention potential missing segment data for some tickers or how segments are defined. This is adequate but leaves some uncertainty.

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 no filler. It front-loads the key information—what data is retrieved and at what granularity—making it easy to parse quickly.

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?

The tool is relatively simple with two parameters and an output schema, so the description covers the core purpose. However, missing parameter semantics and lack of any guidance on data availability make it only minimally complete for an agent that needs to decide when this data is reliable.

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%, and the description does not explain either parameter. The ticker and period are left entirely to the schema's enum and type definitions. The description only names the output fields, not the input semantics, so it fails to compensate for the lack of parameter descriptions.

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 tool fetches revenue and operating income by reported business segment, which is a specific verb and resource. This distinguishes it from sibling tools like get_income_statement, which return company-wide financials rather than segment-level data.

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 phrase 'reported business segment' makes the intended use case clear: retrieving segment breakdowns when needed. It does not explicitly exclude alternatives like get_financial_metrics or get_income_statement, but the segment focus implicitly differentiates it.

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