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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false and openWorldHint=false, so the safety and idempotency profile is fully covered elsewhere. The description adds account scope and lists the kinds of attributes returned (type, unit count, booking mode, check-in/out times), but since an output schema exists it need not and does not go further into return format, pagination, or result size.

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, both front-loaded: the first defines the resource and its examples, the second gives the routing/ordering cue. No filler, no restatement of the title, and every clause carries information.

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 zero parameters, an output schema present, and rich annotations, the description carries the only remaining burden — what this resource is and when to call it — and it does both. Nothing an agent needs to select or invoke the tool 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?

The tool takes zero parameters (empty object schema), so there are no parameter semantics to document and the baseline of 4 applies. Nothing in the description misleads about inputs; a brief note that no arguments are required would have been a small bonus.

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 ('Lists the bookable assets on the connected Nexwin account') and immediately defines the domain in a way that separates it from the sibling list_team_members: 'things customers book rather than people, such as hotel rooms, campsites, vehicles or equipment.' An agent can distinguish this from other list_* tools without opening any 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 an explicit workflow cue with a named sibling: 'Call this before add_assets to see what is already there.' The 'rather than people' phrasing implicitly steers away from list_team_members without naming it, so there is no explicit when-not statement, keeping it just short of 5.

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