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

readOnlyHint=true already tells the agent this is a safe read. The description adds useful domain context by defining endDate as the last night rather than check-out, but it says nothing about pagination behavior even though a page parameter exists, nor about rate limits or result size limits.

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 compact sentences, front-loaded with the semantic payload (per-date boolean, endDate meaning) and ending with the source endpoint. Nothing is wasted.

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 five-parameter, no-required, read-only list tool with full schema coverage and no output schema, the description is almost complete. The only gap is that pagination behavior and the shape of the returned availability map are left entirely to the schema and API docs.

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 every parameter is already documented in the schema, including the endDate 'last night' clarification, which the description largely repeats. Baseline 3 is warranted since the description adds no syntax or semantics 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 — per-date true/false availability for rooms over a range of nights — and pins down the return semantics (per-date boolean). It does not, however, distinguish itself from close siblings like beds24_get_room_calendar or beds24_get_room_offers, which an agent may confuse with this one.

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 guidance on when to use this tool versus the related calendar/offers tools, and no stated preconditions beyond the implicit date-range arguments. The agent must infer the selection criteria from the sibling names alone.

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