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

Annotations already declare readOnlyHint=true and openWorldHint=true, so the safety profile is covered. The description adds one useful behavioral fact, that results are drawn from the default holiday policy, but says nothing about ordering, volume, or what an empty result means. That is a fair value-add without going beyond it.

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 sentence, with the resource and scope front-loaded before the parenthetical qualifier. Nothing is wasted, though the parenthetical slightly interrupts the sentence rather than following it.

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?

This is a read-only list tool with zero required parameters, a fully described schema, and no output schema. The description covers what is returned and where it comes from, which is enough to call it correctly. Only minor details, such as whether inactive holidays are excluded by default, are left to the schema.

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%: the year bound (1990–2100) and the show_inactive default are both documented in the schema. The description only implies year-scoped retrieval and adds no format or edge-case detail beyond what the schema already provides, so the 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?

States a specific verb and resource ('List the company's holidays') and adds a scope qualifier that separates it from talenox_list_holiday_policies: the results come from the default holiday policy rather than being a list of policies. It stops short of naming a sibling outright, but an agent can tell what it returns without opening the 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?

The 'for a year' phrasing implies the retrieval scenario, but there is no explicit when-to-use versus when-not-to-use guidance, no mention of talenox_get_holiday_policy for policy details, and no hint about when to set show_inactive. Usage has to be inferred from the wording.

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