rentals.check_availabilityCheck the current published availability state and earliest date for one rental. This does not create a hold or reservation.
| Name | Required | Description | Default |
|---|---|---|---|
| locale | No | de | |
| rentalId | Yes |
| Name | Required | Description | Default |
|---|---|---|---|
| result | Yes | ||
| status | Yes |
Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, destructiveHint=false, and idempotentHint=true. The description adds minimal value by confirming it is non-destructive, but does not elaborate on other behavioral aspects like latency, caching, or data freshness.
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 two sentences, front-loaded with the core purpose, and contains no superfluous information. Every word is essential.
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?
Given the tool's simplicity, annotations covering safety, and an existing output schema (not shown), the description is largely complete. It could mention the scope of 'earliest date' or 'published state', but overall it suffices.
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?
The input schema has 0% description coverage, and the description does not explain the purpose of 'rentalId' or 'locale'. While the parameters are simple, the description fails to add semantics beyond the schema, leaving the agent to infer meaning.
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 clearly states the tool checks 'current published availability state and earliest date for one rental', using a specific verb ('check') and resource ('availability'). It is distinct from sibling tools like 'rentals.get' and 'reservations.get_status' by focusing on availability state.
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?
The description explicitly notes it does not create a hold or reservation, clarifying it is a read-only query. However, it does not provide explicit comparison to alternatives or when to use this versus other rental tools.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.
Add one secure layer between your agents and this server.
Each tool is clearly scoped to a distinct action within its domain (applications, viewings, rentals, etc.). Verbs like start, update, submit, create, propose, accept are unambiguous and non-overlapping.
All tools follow a consistent domain_verb pattern in snake_case (e.g., applications.start, rentals.search, viewings.propose_availability). No mixing of styles.
21 tools cover a broad rental lifecycle (discovery, applications, quotes, viewings, payments, contracts). While slightly above the typical 15-tool sweet spot, each tool has a defined purpose and no redundancy.
The lifecycle from rental search to booking confirmation and contract signing is well-covered. Minor gaps exist (e.g., no explicit cancellation or withdrawal tools), but the core flows are complete.