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

Annotations already cover readOnly/idempotent/openWorld safety, so the bar is lower, but the description adds genuinely useful context: it produces a link rather than completing a booking, and it routes around OTA commission. This clarifies that no reservation is created, which is exactly the kind of side-effect disclosure that matters.

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, zero filler, and the core action is front-loaded ahead of the optional-parameter note. Every clause earns its place by adding either scope or usage context.

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?

An output schema exists, so return-value detail is unnecessary, and the annotations plus 100% schema coverage handle safety and parameters. The only thin spot is the absence of explicit routing guidance versus the availability/detail siblings, which keeps it from a 5.

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% and each parameter already documents its flow restriction and format, so the schema carries the load. The description only reiterates that dates/type/persons are optional, adding no syntax or constraint detail beyond the schema — the baseline 3 applies.

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 names a specific verb (genereren) and resource (directe boekingslink naar de booking engine op la-truite.com), so the agent knows exactly what comes back: a URL. It does not explicitly name the sibling tools, but the sibling set (availability/details lookups) is functionally distinct enough that confusion is unlikely.

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?

It implies the usage context — prefilled values are optional and the guest finalizes the booking themselves — which tells the agent this is a hand-off tool, not a booking tool. However, it never states when to prefer this over getAvailability or getAccommodationDetails, so the agent must infer the routing.

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