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

Annotations already declare readOnlyHint, idempotentHint and destructiveHint=false, so the safety profile is covered. The description still adds real behavioral context beyond them: the fixed two-month window and the fact that prices are per night before cleaning fee and taxes. It leaves open what happens at range boundaries or for unbookable days.

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 with no waste. The return scope is front-loaded ahead of the price caveat, and every clause carries information the caller needs.

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?

All four required parameters are fully documented in the schema and the tool is a safe read, so the bar is modest and the description meets it. With no output schema present, it could have sketched the per-day record shape a bit more (e.g. booked vs available) to fully stand in for the missing return contract.

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 100%, so the baseline is 3, but the description genuinely extends the schema: it clarifies that year/month denote the START of a two-month window and that propertyId refers to a single unit, neither of which the schema states on its own.

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 and resource ('Returns day-by-day availability and nightly price for one unit') and pins the scope precisely ('two consecutive months starting at the given month'). That scope makes it clearly distinct from get_property (metadata) and get_quote (priced quote) without needing to open a 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?

There is no explicit when-to-use guidance and no named alternative, even though get_quote is an obvious overlap given this tool also returns prices. The note that prices exclude the cleaning fee and taxes hints that get_quote is needed for totals, but the agent must infer that routing itself.

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