estimate_trip_cost

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

With no annotations, the description carries the full burden. It only states the outcome (a budget breakdown) but does not disclose how the estimate is computed, whether it requires live data, what factors affect the result, or what the response format looks like. This is a significant gap for a tool that produces an estimate.

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 concise sentence with useful detail about the breakdown categories. It is efficient and front-loads the core purpose, though it lacks additional context that would make it more informative.

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?

This tool has 5 parameters, no output schema, and no annotations. The description is too sparse to fully guide an agent: it does not explain how origin, travelers, or budget_level influence the estimate, nor what the response structure is. More detail is needed for correct invocation and interpretation.

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 all parameters already have descriptive text. The tool description adds no extra semantics beyond listing the budget categories. Since the schema handles parameter meaning, a baseline of 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 uses a specific verb ('Get') and a clear resource ('detailed budget breakdown'), and enumerates the cost categories (accommodation, food, transport, activities). This distinguishes it from sibling tools like create_itinerary or get_weather_insights.

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?

No guidance is given about when to use this tool versus alternatives. It does not mention any prerequisites, exclusions, or conditions that would help an agent select it over other travel-related tools.

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