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

Annotations already declare this as read-only, idempotent, closed-world and non-destructive, so the bar is lower. The description adds meaningful context by disclosing that hotel figures are typical peak-season estimates rather than quotes, which is important for how an agent should present the result.

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?

One front-loaded sentence plus a short caveat. Every clause carries information: comparators, dimensions, and estimate caveat, with no waste.

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?

An output schema exists, so return values need not be explained. The description covers what is compared and the key caveat about estimates. The only minor gap is not stating what happens when the optional alternative is omitted.

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% and the enum fully documents the optional alternative values. The description names the same alternatives, reinforcing them but adding no syntax or behavior beyond the schema, so baseline 3 applies.

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?

It states a specific verb (compares) and precise scope: The Galena Penthouse against four named Aspen hotels and Airbnb/VRBO on named dimensions. That is clearly distinct from informational siblings like get_amenities or get_property_overview.

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 comparison context implies when to use it, but there is no explicit instruction like 'use when a guest asks how the property stacks up against hotels' or guidance on when to prefer get_amenities. It also doesn't say whether omitting the alternative returns all comparisons.

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