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

Annotations already establish readOnly/idempotent/openWorld and non-destructive behavior, so the bar is lower. The description still adds real value beyond them: live (i.e., dynamically priced) results, coverage limits via 'where available', budget filtering, and that both hotel and vacation-rental inventories are queried.

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 dense sentence with the anchor and return contents front-loaded; nothing is wasted. The parenthetical placement of the 'lat,lon' alternative is slightly awkward but doesn't hurt comprehension.

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 9-parameter, no-output-schema tool, the description usefully sketches the return payload (prices, ratings, photos) and the budget filter. It stops short of describing pagination, result ordering, or what happens when no lodging is found, which would be needed for a 5.

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 89%, so the parameters are already well documented in the schema. The description restates the key dimensions (dates, party, budget, location) without adding syntax or format detail, which earns the baseline 3.

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 the resource (places to stay) and the anchor (ski/beach resort or 'lat,lon'), plus what it returns: live nightly prices, ratings, photos. That is enough to separate it from search_beach_resorts/search_ski_resorts, though it never names those siblings, so maximum clarity isn't reached.

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 'near a ski or beach resort' framing implies a context, but there is no explicit when-to-use or when-not-to-use guidance, and no routing against the several nearby-relevant siblings (search_beach_resorts, search_ski_resorts, plan_trip). An agent gets no help choosing between them.

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