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

No annotations are provided, so the description carries the full behavioral burden, yet it says nothing about read-only semantics, permission requirements, lookup failure behavior (unknown region or engine), or whether the lookup is cached/exact-match. Only the barest hint of behavior is conveyed by the verb 'Получить'.

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 no filler, which is appropriate for a two-parameter lookup. It is arguably too terse rather than padded, so it loses little on structure.

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 only two required, fully documented parameters and an output schema covering the return value, the description is minimally sufficient. It still omits the failure path and any note that the result feeds into other region-scoped tools, which is the main remaining gap for a simple lookup.

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 enum for 'engine' (yandex, google, yandexLive) is documented in the schema itself, so the parameters are already fully specified. The description merely restates the two inputs without adding format hints, case sensitivity, or matching rules for the region name.

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 specific verb and resource ('Получить идентификатор региона') plus the two lookup keys (name and search engine), so an agent knows exactly what the tool produces. It does not, however, distinguish itself from nearby siblings such as get_serp or get_position, which also deal with engines and regions.

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?

There is no guidance on when to call this versus alternatives, no mention of prerequisites (e.g. that the returned region ID is needed by other tools), and no statement of what to do when a region is not found. The agent must infer usage entirely from the name.

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