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

No annotations are provided, so the description must carry the full transparency burden. It reveals important behavioral traits: the data is public domain, requires no API key, and updates monthly. This goes beyond a simple 'get' but does not disclose pagination, response format, or potential rate limits. For a simple read-only tool, this is adequate but not rich.

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 two sentences with no fluff. The first sentence states the action and result; the second provides source and access details. 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?

For a parameterless read-only tool with no output schema, the description is sufficiently complete. It explains what data will be returned (fine troy ounces, book value, by location), the source, and the update frequency. An agent can select and invoke this tool with confidence.

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, so the baseline score is 4. The description mentions 'by location' as an output grouping concept, not a parameter, and does not need to add parameter-level detail since none exist.

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 uses a specific verb ('Get') with a well-defined resource ('U.S. gold reserve holdings') and includes specific content details ('fine troy ounces and book value by location'). It clearly distinguishes itself from other treasury tools that focus on debt, interest rates, or auctions.

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 clear context: it specifies the data source (U.S. Treasury Fiscal Data) and update frequency (monthly), which helps an agent know when to use it. It also notes 'no key' and 'public domain,' making access requirements explicit. However, it does not explicitly exclude alternatives or contrast with sibling treasury tools.

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