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

Annotations already declare readOnlyHint=true and openWorldHint=false, so the safety profile is covered. The description adds genuinely new context: the data source is the RDW, results are the most recent recalls ('nieuwste'), and each result contains the defect and the date — useful since there is no output schema.

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?

A single sentence with zero padding; the scope (brand, optional model) and the returned fields are front-loaded, and every clause carries information.

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 two-parameter read-only lookup with a fully described schema and annotations, the description covers purpose, source, and return content. It lacks only minor edges such as ordering/limit behavior or what an empty result means, which are low-stakes here.

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?

Schema coverage is 100% and both parameters are described with examples in the schema itself, so the schema does the heavy lifting. The description only restates that 'merk' is required and 'model' optional, adding no format or matching semantics beyond what the schema already says.

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 (RDW recall actions) scoped to a car brand and optional model, plus what it surfaces (defect and date). It is unambiguous on its own, though it does not explicitly differentiate itself from the surrounding sibling tools (which are all unrelated domains, so the practical risk is low).

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?

Usage is implied by 'voor een automerk (en eventueel een model)' — an agent can infer you call it with a brand and optionally a model. There is no explicit statement of when to use this versus alternatives, no prerequisite or edge-case guidance (e.g. unknown brand, no recalls found).

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