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

No annotations are supplied, so the description carries the full burden. It usefully discloses that the price is an 'indicative direct-booking price' (i.e. not a confirmed quote), but says nothing about what happens when dates are occupied, whether the price is per night or total, currency, or any minimum-stay rules.

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 short sentences, front-loaded with the property identity and outcome. The Italian sentence is a full restatement of the English one and adds no new information for an agent, but it is compact and does not obscure the lead content.

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 two-parameter read tool with no output schema, the description gives enough: what is checked, the property context, and what comes back (availability plus an indicative price). Remaining gaps — currency, price granularity, and unavailable-date behavior — are modest given the tool's simplicity.

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% — both checkin and checkout are documented as YYYY-MM-DD arrival/departure dates — so the schema already carries the parameter meaning. The description adds only the generic phrase 'for the given dates' and no constraints such as date ordering or maximum stay.

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?

States a specific verb (check), a specific resource (availability of Casa Rosanna, a named holiday home in Porto Ottiolu with a 5-guest capacity), and the secondary output (indicative direct-booking price). An agent can immediately distinguish this from beach_today, house_info, and list_weeks without opening the schema.

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?

Usage is implied clearly — call this when a user wants to know if the house is free for a date range — but there are no explicit when-to-use/when-not statements and no routing to alternatives (e.g. list_weeks for browsing open weeks). The agent must infer the boundary.

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