获取COMEX库存数据

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

No annotations are provided, so the description must disclose operational details. It only states the data source and metal types, but omits the response format, units, data frequency, pagination behavior, or any side effects. This is insufficient for the agent to fully anticipate the tool's behavior.

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 concise sentence that immediately conveys the tool's core function without any redundant phrases. It is front-loaded and every word contributes.

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 absence of an output schema and annotations, the description should explain what the returned inventory data represents (e.g., historical series, current stock levels) and how the output is structured. It only provides a high-level purpose, making it incomplete for a data retrieval tool.

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 already describes both parameters with 100% coverage, including suggested range for limit and supported values for metal. The description adds no additional parameter details beyond referencing gold/silver, so it meets the baseline without adding extra meaning.

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 COMEX exchange gold or silver inventory data ('获取COMEX交易所黄金或白银库存数据'), specifying a concrete verb and resource. It is distinguished from sibling tools like pm_spot_prices and futures_inventory by naming the exact exchange and metal scope.

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 mentions the use case '用于判断供需关系' (to assess supply-demand), providing some context, but it does not explicitly state when to use this tool over alternatives such as pm_basis or futures_inventory, nor does it mention exclusions. Thus usage guidance is implied but not explicit.

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