explain_travel_timing

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

Description discloses read-only nature, no authentication, no booking link, and no booking side effects. Annotations already declare readOnlyHint, destructiveHint, and idempotentHint true, and the description adds context consistent with annotations, no contradiction.

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?

Description is concise—three sentences covering purpose, usage, and behavioral traits. No wasted words; front-loaded with the core action and scope.

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 lightweight advice tool with no output schema, the description covers all necessary context: purpose, parameters, when to use, behavioral properties. Complete and sufficient for an AI agent to invoke correctly.

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% (both parameters have schema descriptions), so baseline is 3. The description does not add further meaning beyond schema; it only mentions parameters are 'optional' and used to determine route internationality, which is already in schema.

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 the tool explains travel timing and logistics, listing specific topics (booking windows, airport arrival timing, layovers, seasonal considerations). It distinguishes itself from the sibling 'search_travel_options' by specifying use for advice questions vs. route-specific search.

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?

Explicitly states when to use (advice questions about booking or arrival timing) and when not to use (route-specific flight search, which is covered by 'search_travel_options'). This provides clear guidance on tool selection.

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