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

Annotations already declare readOnlyHint=true and openWorldHint=false, so safety is covered. The description adds real behavioral context beyond that: the figures are medians aggregated across all of a city's Edit hotels on Chase Travel, and the response includes summary cheapest/priciest months. It omits caveats such as currency or the time window covered.

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 sentence, front-loaded with the resource and scope, with the returned highlights (cheapest/priciest months) tacked on efficiently. No filler.

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 no output schema, the description correctly carries the burden of describing returns: month-by-month medians plus cheapest/priciest months. For a one-parameter read-only tool this is nearly sufficient; minor gaps are the absence of currency/units and the date range the medians are computed over.

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 is a single 'city' parameter with 100% schema description coverage, so the schema already carries the parameter semantics; baseline 3 applies. The description confirms the aggregation is per-city but adds no format or matching guidance beyond the schema's 'City name, e.g. Tokyo'.

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 names the specific resource and scope: month-by-month median Chase Travel nightly rates for a city's Edit hotels, plus the cheapest and priciest months. That clearly separates it from search_edit_hotels and get_edit_hotel, which deal with individual hotels rather than month-level pricing. It is a noun phrase rather than a verb+resource action statement, which keeps it just short of a 5.

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 by the content ('cheapest and priciest months'), so an agent can infer this is the tool for seasonal price comparison. However, no explicit when-to-use, when-not-to-use, or alternative (e.g. search_edit_hotels for actual availability) is stated.

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