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

Annotations already declare readOnlyHint, idempotentHint and a closed-world scope, so the safety profile is covered. The description adds the meaningful product constraint that the weekend dinner is mandatory, but says nothing about auth, limits, or how the availability result behaves. Adequate but not rich.

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?

A single front-loaded sentence with the verb first and zero filler. The parenthetical is dense but earns its place by defining the product. Efficient overall.

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 an output schema present and full parameter coverage, the description need not explain return values, and the annotations cover the safety profile. For a read-only date-range availability check it is sufficiently complete; only the sibling routing is missing.

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%, including patterns and the language enum, so the schema already carries full parameter meaning. The description adds no format or default detail beyond it, making 3 the correct baseline.

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?

Specific verb ('Controleer') plus a well-defined resource: Camp & Dinner, explained as 'camperplaats + verplicht weekenddiner', and the returned items (vrije plaatsen, prijs, dineravonden, ontbijtdagen) are named. This implicitly separates it from getAccommodationDetails and getRestaurantAvailability, but no sibling is named explicitly, so it falls short of a 5.

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 states only that it checks a period; there is no guidance on when to choose this over getAvailability, getRestaurantAvailability, or getAccommodationDetails, nor any prerequisite or exclusion. An agent must infer the selection rule from the name alone.

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