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

Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, so the description adds minimal behavioral context. It correctly implies a read-only search operation but does not disclose details like pagination limits, response structure, or rate limits. The description is consistent with annotations but does not meaningfully extend them.

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 17-word sentence that efficiently states the tool's purpose. Every word earns its place, and there is no redundancy or unnecessary detail. It is appropriately concise.

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's complexity (29 parameters, no output schema), the description provides only a high-level overview. It does not explain search behavior, default sorting, or output format. While schema descriptions cover parameters and annotations cover safety, the description lacks completeness for an agent to fully understand the tool's behavior without additional exploration.

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% with descriptions for all 29 parameters. The description generically mentions filtering by 'location, dates, category, and filters' but adds no specific meaning beyond the schema. Per guidelines, high coverage sets a baseline of 3, which is appropriate as the description does not enhance parameter understanding.

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 verb 'Search' and the resource 'vehicles' in the Pocket Drives marketplace. It lists key filtering dimensions (location, dates, category, filters). However, it does not differentiate from sibling tools like drives_vehicle_availability or drives_venue_search, which limits its clarity for tool selection.

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 for searching available rental vehicles with various filters. It mentions filtering by location, dates, category, etc., which gives some context. However, it does not provide explicit guidance on when to use this tool versus alternatives like drives_vehicle_availability for availability checks or drives_venue_search for venue searches, leaving the agent to infer.

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