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

Beyond the annotations, it enumerates the three outcome branches (answered/unanswered/urgent) and their semantics, discloses the important side effect that an unanswered question is actually sent to the hotel, and instructs quoting the hotel's text as written ('Follow say') and never guessing. This is exactly the behavioral detail the annotations do not carry.

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?

Dense and front-loaded: the purpose comes first, then the outcome semantics, then routing. Sentences are terse and mostly earn their place, though the clipped fragments ('Follow say.') and the outcome/booking interleaving make it slightly harder to parse than it needs to be.

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 correctly carries the return semantics by naming the outcome values and the answer field, plus routing for booking. Only minor gaps remain, such as the role of the optional lang parameter relative to the returned answer.

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 the baseline is 3. The description restates that hotel is an id from search_hotels/resolve_hotel or a domain, which is already in the schema, and adds only the framing that question is about published facts; it adds little beyond the structured fields.

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 verb and resource ('Ask a VibeBooking hotel a question') and scopes it to published facts (parking, wifi, luggage, check-in, children, getting there). It distinguishes itself from siblings by routing booking to booking_url and naming search_hotels/resolve_hotel as the source of the hotel id.

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?

It gives clear context for when to use it (questions the hotel's published facts may answer) and explicitly redirects booking elsewhere ('To book, give booking_url'). It stops short of saying when not to ask (e.g., versus get_hotel or get_rates), so it is strong but not exhaustive.

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