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

With no annotations, the description carries the burden of behavioral disclosure. It explicitly states the tool 'Returns tour summaries' rather than modifying data, and clarifies that booking finalization happens via the embedded concierge on page_url, not through the tool itself. This gives the agent a clear read-only mental model. It does not mention rate limits, auth, or exact result count, but these are less critical for a search 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?

The description is three sentences, each earning its place: the first defines the search scope, the second enumerates the return fields, and the third explains the significance of page_url. It is front-loaded with the core action and contains no filler or repeated schema information.

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 there is no output schema, the description compensates by listing the return fields (title, slug, duration, price, destinations) and the optional page_url, which is essential for booking flow. The only notable omission is the page parameter's behavior, which could leave an agent unsure how to paginate. Overall, the essential context for a search tool is present.

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 67%: query and destination have descriptions, but page has none. The description adds the concept of 'duration' as a search dimension, which helps map to the query parameter, and lists output fields that can guide query phrasing. However, it does not clarify the page parameter or its pagination semantics, leaving a gap for agents needing to request additional result pages.

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 states a specific verb ('Search') and resource ('Egypt and Jordan tour packages'), with clear scope by destination, duration, or keyword. It also describes the return type as summaries with specific fields, distinguishing it from siblings like get_tour and get_pricing, which presumably return detailed single-tour or pricing data.

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?

The description clearly implies when to use this tool: when searching for tours by destination, duration, or keyword. It also explains that returned page_url links host the AI concierge for finalizing dates and booking, implying the tool itself does not complete bookings. However, it does not explicitly contrast with alternate tools or state when not to use it, so it falls short of a 5.

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