macro_usa_trade_balance

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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, covering the safety profile. The description adds the date range and return type (pandas.DataFrame), which is useful but does not disclose other behavioral traits like columns, data frequency, or pagination. No contradiction with annotations.

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 compact and front-loaded with the main purpose, followed by a source URL and return type. It is a single coherent block though not elegantly structured; the URL is arguably extraneous, but it does not waste many words.

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 simplicity of the tool (no parameters, no output schema), the description provides adequate context: it identifies the report, the date range, and the return format. Annotations cover safety, so the agent knows it is a safe read operation. It does not enumerate specific columns, but that is acceptable for a straightforward 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 tool has zero parameters (schema coverage is 100% vacuously). Per the baseline for 0 parameters, a score of 4 is appropriate. The description does not need to explain parameter semantics because there are none, and it does not add confusion.

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 returns the US trade balance report ('美国贸易帐报告') with a date range from 19700101 to present. This distinguishes it from sibling tools like macro_uk_trade or macro_china_trade_balance by specifying the USA, though it lacks an explicit action verb like 'get' or 'fetch'.

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?

No guidance is provided on when to use this tool versus alternatives. The description does not mention any exclusions, prerequisites, or comparisons to sibling macro trade tools. It is not misleading, but there is zero usage direction.

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