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

No annotations are provided, so the description carries the full disclosure burden. It does add useful provenance (data derives from that year's SKB 3 Menteri decree), which implies read-only, authoritative, decree-bounded data, but it says nothing about behavior for years whose decree is not yet published or any error/edge conditions.

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 with no filler; the resource and the temporal scope come first, and the provenance clause is a compact trailing modifier. Nothing needs trimming.

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 simple single-parameter read tool with no output schema and no annotations, the description conveys resource, scope, and source adequately. The main residual gap is that the shape of returned records (date, name, whether joint leave is flagged separately) is never hinted at.

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 single 'year' parameter is already documented in the schema with bounds and an example. The phrase 'for one year' reinforces that year selects the decree, but adds no syntax or format detail beyond the schema, 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?

The description names a specific resource (public holidays / libur nasional plus joint leave / cuti bersama) and a clear scope (one year). It implicitly distinguishes itself from check_holiday by returning the whole year rather than a single date, but it never names that sibling or any other, so differentiation must be inferred.

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 only implied: the year-scoped framing suggests 'use this to enumerate a full year of holidays', with check_holiday as the obvious per-date alternative. There is no explicit when-to-use, when-not-to-use, or named alternative.

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