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

The readOnlyHint annotation already establishes that this is a safe read operation. The description adds that it returns a direct booking link for a specific apartment and supports IT/EN, but it does not describe the return format, authentication needs, or rate limits. With annotations covering safety, this level of added context is 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?

The description is a single short sentence with zero waste, front-loading the resource and key qualifiers (languages, apartment). It is appropriately sized for the tool's simplicity.

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?

For a simple read-only link getter, the description covers the core purpose and language options. However, with no output schema, it should ideally mention that the return value is a URL, and it lacks any usage context relative to the sibling tool. It is adequate but has clear gaps.

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 0%, and the sole parameter is an enum (it/en). The description repeats the allowed values as '(IT/EN)', which maps directly to the schema's enum and adds some clarity about language, but it does not explain the effect of omitting the parameter or whether a default language exists. Baseline 3 for minimal compensation.

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 resource — a direct booking link for Oronzo Apartment Washington, Milan — and notes language options (IT/EN). The verb is implied by the tool name rather than stated, and it does not differentiate from the sibling search_stays, but the purpose is clear enough.

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?

No guidance is given on when to use this tool versus alternatives, nor any prerequisites or context. The sibling search_stays is not mentioned, so the agent must infer the appropriate usage scenario.

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