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

Annotations already declare readOnlyHint=true, idempotentHint=true and openWorldHint=false, so the safety/behavioral profile is covered structurally. The description adds useful domain disclosure — that this is authoritative 'unique factory data' and which topics it covers — but says nothing about freshness, caching, or fallback behavior when a region is unavailable. With annotations carrying the main load, this is adequate but not rich.

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 dense sentences with the region list and covered topics front-loaded; no wasted preamble. The trailing clause about 'unique factory data' is slightly promotional but still earns its place as a trust/source signal.

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 one optional parameter at full schema coverage, an output schema handling return values, and annotations covering read-only/idempotent behavior, the description supplies what remains: what data is inside and which regions exist. Only the routing story (vs get_faq/ask_manager) is left implicit.

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%, so the region parameter and its valid values (ru/kz/by/uz, ru default) are already documented. The description repeats the region codes and adds 'дальнее зарубежье' (far abroad), which slightly muddies semantics since the schema enum has no such value — marginal value over structured data.

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 states a concrete resource (delivery/export conditions for Twait factory machines) and enumerates the payload (lead times, customs, ST-1, documents, far abroad) plus the four supported regions. It is clearly a regional reference lookup, though it does not explicitly contrast itself with siblings like get_faq or get_company_info that could plausibly cover overlapping topics.

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: 'Уникальные данные завода для расчёта клиенту' hints this feeds client price calculation (alongside calculate_machine_price), but there is no explicit when-to-use, when-not-to-use, or named alternative. An agent can infer the context but gets no routing guidance.

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