tool_fare_calendar

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

Discloses sampling up to 15 departure dates, day-of-week analysis, price tiers, and round-trip option via trip_length_days. No annotation contradictions, but does not mention rate limits or authentication; still strong for a read tool.

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?

Well-structured with a clear title, summary sentence, bullet-like explanation, and parameter list. Efficient but could be slightly more compact; however, every sentence adds value.

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 8 parameters, 2 required, no output schema, the description covers purpose, parameters, and high-level behavior. Lacks explicit return format details, but the mention of 'price tiers' and 'best/worst weeks' hints at output. Minor gap but still informative.

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?

Despite 0% schema description coverage, the description's Args block explains each parameter (origin, destination, year, month, adults, etc.) with defaults and examples (e.g., 'JFK' for origin). Fully compensates for missing schema descriptions.

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?

Clearly states this tool finds the cheapest day to fly within one month, using 'PRICE timing (day-level): cheapest DAY to fly within ONE month.' Explicitly distinguishes from siblings like find_cheapest_month and best_month_to_visit.

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?

Provides explicit guidance on when to use (cheapest day within one month) and when not to (use find_cheapest_month for month-level, best_month_to_visit for weather), naming specific alternative tools.

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