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

The annotations already declare the tool as read-only, idempotent, and non-destructive, so the safety profile is covered. The description adds valuable behavioral context, such as that packages are hand-curated, live on dedicated /packages/ pages, include a preview hotel and ticket category, and that prices include all components. It also clarifies that results are 'complete trip recommendations'. This goes beyond the annotations without contradicting them.

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 dense paragraph that is front-loaded with the core purpose, then lists filters, and closes with a distinction from a sibling. It packs a lot of information without being verbose or repetitive. A slight improvement would be splitting into bullet points, but it is well-structured and efficient.

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 the tool has 8 parameters, no output schema, and annotations that already cover safety, the description provides enough context for an agent to call it correctly: it explains what results look like ('complete trip recommendations'), that prices are inclusive, and routes ticket-only queries elsewhere. Missing details like pagination or return format are minor given the absence of an output schema and the tool's read-only nature.

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 50%; the schema describes city, country, category, and package_type, while the description adds context for date range and package type. However, the description does not clarify the semantics of limit (e.g., pagination or maximum results) or currency (e.g., conversion or display options). It adds some value but does not fully compensate for the uncovered parameters, so it meets the baseline of adequacy but not more.

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 a clear resource ('hand-curated trip packages bundling event tickets + hotel + experiences'), with a distinct value proposition ('savings vs DIY booking'). It explicitly differentiates from a sibling tool ('ticket-only inventory is returned by search_events'), making it immediately clear what this tool is for and not for.

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 explicitly names the alternative (search_events) and the condition that selects it ('ticket-only inventory'), which is a clear when-not-to-use directive. It also lists the available filters (category, city, country, date range, package type) with examples, providing practical guidance on when to invoke this tool. This is explicit and leaves no ambiguity.

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