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

Annotations already declare readOnlyHint=true, and the description adds useful behavioral detail: the set of possible ride statuses and the conditional availability of driver/vehicle/plate data only after assignment. This is meaningful context beyond the structured annotations.

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 two compact sentences with no filler. It front-loads the core purpose and status list, then immediately states the required inputs, making every sentence useful.

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?

With no output schema, the description appropriately names the returned data categories: status, driver name, vehicle, and plate. It also communicates the conditional nature of some fields. It could mention error behavior or real-time freshness, but for a simple read-only lookup tool it is reasonably complete.

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 description coverage is 0%, so the description must carry the semantic weight. It explains that rider_phone is the phone used to book and that ride_id is needed alongside it, which adds meaning the schema alone does not convey, though it could go further in describing expected formats or relationship between the two.

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 identifies the operation as retrieving the current status of a BinaSmart ride and enumerates the possible statuses. It also specifies that driver name, vehicle, and plate are included once assigned, which makes the tool's purpose distinct from siblings like cancel_ride or request_ride.

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 makes clear that this tool is for checking a ride's current status and states the required identifying information: ride id and rider phone used to book. It does not explicitly contrast with alternatives, but the read-only status vocabulary and required parameters provide clear usage context.

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