macro_cons_gold

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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false and openWorldHint, so the safety profile is covered. The description adds genuinely new context — the temporal coverage (2004-11-18 onward) and the upstream data source URL — which the annotations do not provide.

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?

Very short and front-loaded with the key identity and date range. Minor noise from duplicated title text and docstring artifacts (':return:', ':rtype:'), but nothing verbose or rambling.

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 zero-argument time series tool with no output schema, the definition supplies enough to call it: what the data is, its temporal coverage, the source, and the return type (pandas.DataFrame). Output columns are unspecified, but nothing blocks correct invocation.

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 takes zero parameters, so there are no semantics to document; per the baseline this scores 4. The description appropriately spends no words on inputs.

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?

States a specific resource and scope: the SPDR Gold Trust (world's largest gold ETF) holdings report, with an explicit data range from 2004-11-18 to present. This clearly differentiates it from siblings like macro_cons_silver or macro_china_au_report, though it never names an alternative explicitly.

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 contains no when-to-use, when-not-to-use, or alternative-tool guidance. It simply asserts what the tool is; an agent must infer the use case and cannot tell from the text why it should pick this over macro_china_fx_gold or macro_cons_silver.

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