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

Annotations already declare readOnlyHint=true and openWorldHint=true, so safety is covered. The description adds the return shape (reviewer, date, rating, message), which is useful, but says nothing about auth needs, pagination, or whether highlighted vs recent reviews are returned selectively. Moderate added value against annotations that carry the safety profile.

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 sentences with zero filler; the core capability and the returned fields are front-loaded, and the sibling reference is placed last as a pointer.

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 an output schema present, return values need no prose, and the description covers what the tool yields and when to reach for it. The unexplained presence of date/guest/currency parameters on a reviews endpoint is a minor remaining gap but not disqualifying.

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 schema already documents all six parameters and baseline is 3. The description only reinforces that property_id is required and does not explain the seemingly unrelated check_in/check_out/adults/currency parameters for a reviews call, adding no meaning beyond the schema.

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?

States a specific verb (Returns) and resource (a hotel's overall rating and guest reviews), enumerates the returned fields (reviewer, date, rating, message), and scopes it to a known property id. It also names the sibling expedia_properties_detail, so an agent can distinguish it without opening a schema.

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?

Gives a clear usage condition ("for a known property id") and routes the agent to expedia_properties_detail for property detail. It does not state explicit exclusions or what to use when the property id is unknown, so it falls short of a full 5.

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