vehicle_registrations

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

Annotations already declare readOnlyHint=true, destructiveHint=false, idempotentHint=true. The description adds that the tool provides specific data fields (car inventory, electric share), but does not disclose any additional behavioral traits like data freshness, pagination, or licensing. It adds some context but is not comprehensive.

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, making it concise. However, it is front-loaded but lacks structure. Important information about parameters and usage is missing. The brevity compromises completeness.

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 tool has one required parameter, no output schema, and 0% schema coverage, the description should provide sufficient context for use. It explains the data outputs but fails to specify how to use the 'slug' parameter or interpret results. This is inadequate for a functional 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 input schema has 0% description coverage for the single required parameter 'slug'. The description refers to 'a city' and 'registration district' but does not explain that 'slug' is a city identifier or how to obtain it. The description adds no meaningful guidance beyond the schema.

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 provides car inventory and electric share data per city and registration district, which is specific to vehicle registrations. It effectively differentiates from sibling tools by topic, but could be more explicit about the action (e.g., 'returns').

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 on when to use this tool versus alternatives. The description does not mention prerequisite knowledge, typical use cases, or when not to use this tool. Given many sibling tools, this omission hinders correct selection.

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