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

With no annotations, the description carries the full behavioral load and does disclose one important trait: a valid Druk Asia API key is required and is sent automatically via the x-api-key header. It implies read-only behavior through "Retrieves," but says nothing about pagination, result caps, or whether pricing is always returned or only when party parameters are supplied.

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, front-loaded with the core action and return contents, then the auth prerequisite. Slightly dense in the second clause ("dynamic quotation pricing based on party composition and optional filters"), but no filler sentences.

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 no output schema and no annotations, the description does well to describe what comes back (daily breakdown, hotels, activities, pricing) and the auth requirement. However, it omits pagination/result limits and does not clarify whether a party-composition quote requires specific sibling lookups first, which matters for a pricing-sensitive tool with six optional parameters.

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 coverage is 100%, so the baseline would be 3, but the description adds genuine meaning by explaining that adults/children/infants/single_rooms drive "dynamic quotation pricing based on party composition" — clarifying why those inputs are coupled rather than being independent filters. The days and itinerary_category filters are only gestured at with "optional filters," so it falls short of 5.

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?

States a specific verb and resource ("Retrieves itineraries") and enumerates what the result contains: daily breakdown, hotels, activities, and quotation pricing. It is clear what the tool does, but it never distinguishes itself from the sibling get_itinerary, leaving the list-vs-single-lookup boundary implicit.

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?

There is no explicit when-to-use statement and no named alternative. The phrase "optional filters" hints that this is a browse/filter operation, but an agent must infer that it should call this rather than get_itinerary for a single itinerary, and nothing says when the party-composition pricing should be supplied.

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