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

Annotations already establish readOnly, idempotent, non-destructive and closed-world behavior. The description adds genuinely useful non-schema context: reviews originate only from TripWays bookings while the aggregate rating may include other platforms, and written reviews are returned newest first.

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?

A single front-loaded sentence carrying purpose, provenance, and the limit semantics with no filler. Every clause (review contents, rating provenance, ordering) 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?

With an output schema present, return values need not be detailed, and the description still sketches what reviews contain (name, country, date, star rating, text). For a two-parameter read tool, nothing essential is missing.

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 0%, so the description carries the load, and it does: it explains bokun_id identifies a single TripWays tour and spells out limit's range, default, and ordering. It stops short of explaining what a bokun_id is or where it comes from, leaving a small gap.

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 and resource ('Get the rating summary and written reviews for one TripWays tour') and scopes it to a single tour by bokun_id. This distinguishes it from siblings like get_tour_details or search_tours without needing to open 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?

Usage is implied: you call it when you want reviews for a known tour id. However, no explicit when-to-use/when-not guidance or named alternative (e.g., get_tour_details) is offered, so the agent must infer that reviews are not included in the general tour lookup.

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