option_list_symbols

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

No annotations are present, so the description carries the transparency burden. It adds behavioral context with '[FREE]' and 'updated overnight', indicating cost and data freshness. However, it does not disclose return format, ordering, pagination, or possible limitations.

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, front-loaded sentence with no filler. '[FREE]', the list action, the scope, and update frequency are all conveyed efficiently.

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 no-parameter list tool, the description states the core purpose and update schedule. However, with no output schema, it would be more complete if it described the expected return format or any size/ordering caveats.

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 tool has zero parameters and an empty schema, so the baseline of 4 applies. There is no parameter-level meaning for the description to add beyond what the schema already conveys.

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?

Clearly states it lists all traded option underlying symbols, specifying the resource and scope. The 'option' qualifier distinguishes it from stock_list_symbols and index_list_symbols. 'Updated overnight' adds a useful temporal note.

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?

Implied use is when the agent needs available option underlyings rather than stock or index symbols, but the description gives no explicit when/when-not guidance. Sibling names help infer context, but the description itself does not mention alternatives or exclusions.

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