getEcoScore

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

With no annotations, the description should disclose all behavioral traits. It only states what the tool does, but omits what happens if the product is not found, if the Eco-Score is unavailable, or any side effects. As a simple read tool, more transparency on edge cases is needed.

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 conveys the essential function. It is concise, but could be slightly improved by front-loading the rating scale or type of product.

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 (one parameter, no output schema, no nested objects), the description is minimally adequate. However, it lacks details on return format and error behavior, which could be necessary for an agent to use it correctly.

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 input schema has 100% coverage with a description for the single parameter. The tool description adds no additional meaning beyond what the schema already provides, so baseline 3 is appropriate.

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 the tool gets the Eco-Score rating (A-E) for a product. It specifies the rating scale and environmental context, which is distinct from siblings like getNutriScore. However, it does not explicitly differentiate itself from other similar 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 like getNutriScore, nor are there any prerequisites or exclusions mentioned. The agent has no context to decide if Eco-Score is appropriate for the scenario.

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