시장 지수 조회

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

No annotations provided, so the description carries full burden. It discloses the source, output structure, and cross-references. While it doesn't mention auth or rate limits, for a read operation this is sufficient and adds value beyond a basic description.

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?

Two sentences with zero waste. The first sentence states the purpose, the second adds structural detail and cross-reference. Information is front-loaded and every sentence 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 no output schema, the description provides essential context about the output format (first row composite, then sectors) and how to use the results. It is complete enough for a simple market index tool, though it omits pagination or limits which are likely unnecessary.

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 input schema has one parameter (market) with enum and description, achieving 100% coverage. The description does not add additional meaning beyond what the schema already provides, so baseline 3 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 it retrieves KOSPI/KOSDAQ composite and sector indices, referencing the source code ka20003. It also explains the output structure (first row composite, subsequent sector indices) and how the code field links to other tools, which distinguishes it from siblings like get_sector_price.

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 provides context on when to use the tool (for market and sector indices) and hints at a workflow by noting that the code can be used with get_sector_price/get_sector_stocks. It does not explicitly state when not to use or compare with alternatives, but the context is clear enough.

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