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

With readOnlyHint/idempotentHint already covering the safety profile, the description adds genuinely useful behavior: results are capped at 12, sorted by total, and explicitly 'not necessarily the cheapest in the portfolio', which prevents the agent from over-claiming price optimality. It also discloses the returned fields and points to a currency field ('ver moneda') to interpret prices. It stops short of explaining pagination or how the sample is chosen.

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?

Each language version is a tight two sentences, front-loaded with purpose and followed by the caveat about result sampling. The full bilingual duplication doubles the payload for no informational gain, which keeps it from being maximally concise.

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 no output schema, the description usefully enumerates return fields (total price, photo, comuna, capacity, booking link) and delivers the key caveat about result sampling. Gaps: the referenced currency field is never defined, and there is no note on empty-result or date-validation behavior.

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%, so all six parameters are already documented in structured form; the description only restates the comuna and bedroom filters. It adds one nuance but also creates mild confusion: it says results are capped at 12 while the limite parameter defaults to 10 and allows up to 20, and the 'moneda' it references is not a parameter at all.

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 definition states a specific verb and resource (search available Mr BnB apartments in Santiago de Chile for a date range) plus the scope-limiting filters (comuna, minimum bedrooms). It is clear what the tool returns, though it never names or contrasts the sibling tools cotizar and link_de_reserva, leaving that distinction to the agent.

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 only implied: the mention of a date range and comuna/bedroom filters signals when the tool fits, and the note that results are a sample of up to 12 hints that this is for browsing rather than exhaustive price comparison. There is no explicit 'use X instead when...' guidance covering the siblings cotizar (quote) and link_de_reserva (booking link).

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