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

Annotations already declare readOnlyHint, idempotentHint, and closed-world scope, so safety posture is fully covered. The description adds the useful detail that the payload includes the blocked-holidays country and per-holiday on/off state, but does not say what happens when no country is configured or whether team-level overrides exist.

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 front-loaded sentence with zero filler; the returned information (country and per-holiday status) is stated first.

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 usefully characterizes the return value, and annotations cover safety semantics. Minor gap: it doesn't clarify behavior when holiday blocking is unset or whether settings are org- or user-scoped.

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?

Zero parameters, so baseline is 4; the description correctly implies no input is needed, and there is nothing further to disambiguate.

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?

Uses a specific verb ('Show') with a specific returned resource: the configured holiday country plus which holidays are disabled. An agent can distinguish it from update_holiday_settings and toggle_holiday by the read framing, though it doesn't name those siblings explicitly, nor list_holiday_countries.

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 by the read verb — inspect current holiday config before calling update_holiday_settings or toggle_holiday. No explicit when-to-use or when-not guidance, and no mention of list_holiday_countries for discovering available countries.

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