Get ticket URL

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. The description does convey the read-only nature via 'Return' and qualifies outcomes with 'when available,' but it does not describe failure behavior, output shape, or whether an empty result should be treated as an error.

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 12-word sentence with no filler, and the core outcome ('Return a compact ticket purchase URL') is front-loaded before the availability qualifier. Every word earns its place.

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 simple read-only lookup with only 3 parameters and no output schema, the description plus 100% schema coverage is nearly sufficient. The remaining gap is that the return format for the optional raceId case is not spelled out, especially since output schema is absent.

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 100%, so the schema already documents destinationId and date format, raceId optionality, and the cross-tool origin of destinationId from search_bus_station_destinations. The description adds no parameter semantics beyond the schema, so baseline 3 is appropriate.

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 states a specific verb ('Return a compact ticket purchase URL') and names a distinct resource (a ticket purchase URL for a bus station race), distinguishing it from siblings like get_bus_station_races, which return race data rather than purchase URLs. This gives an agent a clear operation, object, and scope in one sentence.

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 gives no explicit guidance on when to use this tool versus alternatives, such as search_bus_station_destinations or get_bus_station_races. An agent must infer the intended workflow from the schema and sibling names, which is not reliable enough.

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