plan_day_trip

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

Annotations already provide readOnlyHint, idempotentHint, openWorldHint. The description adds value by disclosing it's a paid x402 service, returns live output or metadata, and covers timing, water, food, transit, weather, and backup. No contradictions with 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?

Two sentences, approximately 50 words, every sentence provides essential information. Front-loaded with the core purpose, no 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 14 parameters, no output schema, and no parameter descriptions, the description is insufficient for correct invocation. It lacks details on parameter formats, how to combine them, and expected return structure. Agents would struggle to fill in parameters appropriately.

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?

With 14 parameters and 0% schema description coverage, the description does not explain individual parameter meanings. It only gives high-level hints about content (e.g., timing, water, food), but agents cannot infer how to set origin, destination, interests, etc. from this.

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 it connects to a paid day-trip service for destination/route/origin asks, specifying it's for relaxed day out with various aspects. It distinguishes from siblings like plan_weekend_getaway by focusing on day trips, but lacks explicit differentiation from plan_weather_aware_trip.

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?

It provides context for when to use ('relaxed day out') and mentions output options, but does not explicitly state when not to use or compare with alternatives such as plan_weekend_getaway or plan_weather_aware_trip.

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