macro_euro_trade_balance

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

The annotations already declare readOnlyHint, openWorldHint, idempotentHint, and non-destructive behavior, so the description does not need to repeat these. It adds the return type (pandas.Series), unit (亿欧元), and data range, but does not disclose other behavioral details such as data size or potential pagination. The description is consistent 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 includes two long URLs that are source references, which are not necessary for tool selection or invocation. This adds clutter and does not earn its place. The essential information is brief, but the structure is not clean or purposefully organized.

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?

With no parameters and no output schema, the description provides core information: report name, date range, return unit, and return type. However, it is ambiguous whether the returned Series contains all historical values or just the current value, and the reporting frequency is not stated. Since the description carries the full burden due to lack of output schema, this ambiguity is a notable gap.

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 accepts zero parameters and the schema has no properties, so the baseline for parameter semantics is 4. The description naturally does not add parameter details, but it confirms the tool requires no 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?

The description clearly identifies the resource (Eurozone unadjusted trade balance report) and scope (date range from 1999-02-01 to present). It is specific and differentiates from other macro tools by naming the exact metric, but lacks an explicit action verb and does not directly reference sibling tools.

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 such as other eurozone macro indicators or trade balance tools. The description only states what the report contains, not the appropriate context or exclusions.

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