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

The annotations already declare readOnlyHint=true and idempotentHint=true, so the safety profile is known. The description only lists content, not behavioral traits such as data freshness, response format, or whether the data is static. It does not contradict annotations, and the lack of additional behavior notes is acceptable given the annotations.

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 a single sentence that packs a comprehensive list of information types without any filler or redundancy. It is front-loaded with the key content categories and immediately tells the agent what to expect. Every element earns its place.

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 zero-parameter tool with no output schema, the description fully specifies what information will be provided. It covers all relevant categories (description, address, size, amenities, rules, check-in times, review score) and leaves no ambiguity. The simplicity of the tool and the completeness of the description make it entirely adequate.

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?

There are no parameters, so the schema fully covers parameter semantics (vacuously). The baseline of 4 applies because the description does not need to compensate for missing parameter information. The description does not mention parameters, which is consistent with a zero-parameter tool.

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 enumerates the exact data fields (description, address, size, amenities, house rules, check-in times, review score) and specifies the exact property and location (Ferienwohnung Bruno in Garmisch-Partenkirchen). This makes the tool's purpose unmistakable and distinguishes it from sibling tools that focus on prices, availability, or reviews.

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 strongly implies when to use the tool: whenever general accommodation information is needed. It provides clear context via the field list, but it does not explicitly state when not to use it or name alternatives. However, the sibling tools' names inherently suggest their different purposes, so the usage context is largely clear.

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