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

No annotations are provided, so the description carries the full burden. It discloses source, frequency, adjustment, and age scope, but does not describe return structure, potential errors, or whether it returns a single value or a time series. It implies read-only via 'Get' but does not state it.

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 sentence that contains all essential information: metric, frequency, adjustment, age, example codes, and source. There is no waste or redundancy.

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?

The tool is simple with one optional parameter and no output schema. The description covers key dataset attributes, but it does not explain the return format or pagination for time-series data, which could be relevant for an API response.

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 single parameter 'geo' is already fully documented in the schema with examples and a default. The description repeats those examples without adding new meaning beyond what the schema already provides.

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 starts with 'Get Eurostat unemployment rate (%) using a specific verb and resource, clearly distinguishing it from sibling tools like eurostat_gdp and eurostat_inflation. It specifies the exact metric, frequency, adjustment, and age range.

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 specifies the exact dataset characteristics (monthly, seasonally adjusted, age 15-74) and lists valid geo codes, implying when it should be used. However, it does not explicitly mention alternatives or exclusion conditions.

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