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

Annotations already declare readOnly, idempotent, non-destructive and closed-world, so safety is covered. The description contributes beyond that by previewing the response contents (etiquette, phrases in English/local script/romanization, covered cities, dish ids), which tells the agent what it will actually get back from a call.

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, front-loaded with the core purpose and then a compact content inventory. Every clause conveys real information about the payload; there is no boilerplate or repetition of the name/title.

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 carries the burden of describing returns and does so thoroughly, and the annotations cover the safety profile. Only minor gaps remain (error behavior for unknown or unsupported country codes), which an agent could infer but would prefer to see stated.

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 coverage is 100%: the country code format/example and the lang enum with its English fallback are fully documented in the schema. The description adds nothing about parameters, so the baseline 3 applies — the schema does all the work.

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+resource ("a short dining guide for one country") and then enumerates exactly what the guide contains: etiquette, ordering/paying, phrases, cities, dish ids. It is clearly distinguishable from jumuncheck_get_country_rules and jumuncheck_list_dishes, the latter of which it explicitly names.

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 parenthetical "see jumuncheck_list_dishes" routes the agent to the sibling for dish-level detail, implying this tool is the country-level overview. There is no explicit when-not-use guidance versus jumuncheck_get_country_rules or jumuncheck_list_places, so it stops short of full routing.

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