search_vehicles

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It mentions that the tool 'Returns a list of available cars with pricing and features,' which adds some context on output. However, it fails to disclose critical behavioral traits such as whether this is a read-only operation, potential rate limits, authentication needs, or how results are filtered or sorted, leaving significant gaps for a tool with 10 parameters.

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 appropriately sized with two sentences that are front-loaded: the first sentence states the purpose and scope, and the second explains the return value. There is zero waste, and every sentence earns its place by adding essential information without 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?

Given the complexity of 10 parameters and no output schema, the description is partially complete. It covers the basic purpose and return format but lacks details on behavioral aspects like error handling, pagination, or data freshness. Without annotations, it should provide more context on operational constraints to fully guide an AI agent, resulting in a moderate score.

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 description adds minimal meaning beyond the input schema, which has 100% coverage with detailed parameter descriptions. It mentions 'dates, locations, and preferences,' aligning with parameters like pickup/dropoff and vehicle_class, but does not provide additional syntax, format details, or usage examples. With high schema coverage, the baseline score of 3 is appropriate as the schema does most of the work.

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 specific action ('Search for available vehicles'), the resource ('at Enterprise Rent-A-Car'), and the scope ('for specific dates, locations, and preferences'). It distinguishes this from siblings like 'create_reservation' or 'get_vehicle_details' by focusing on availability search rather than booking or detailed vehicle information.

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 implies usage context through 'Search for available vehicles... for specific dates, locations, and preferences,' suggesting when to use it. However, it lacks explicit guidance on when to choose this tool over alternatives like 'get_vehicle_details' or 'create_reservation,' and does not mention prerequisites or exclusions, leaving some ambiguity.

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