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

No annotations are supplied, so the description carries the full behavioral burden and it discloses almost nothing: read-only nature is only implied, and there is no mention of permissions, error behavior for an unknown slug, or what 'доступ' data actually contains. Only the field categories hint at the payload.

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 short clause with zero padding, and the returned-field list is front-loaded. It is arguably over-terse rather than verbose, but nothing is wasted.

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 one-parameter getter this is close to adequate, and with no output schema the field enumeration (ссылка, доступ, SEO, версия) usefully signals the return shape. It still omits lookup failure behavior and any relation to sibling listing tools, leaving the definition barely sufficient.

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 slug parameter is already documented as 'Адрес сайта латиницей'. The description adds no format, examples, or constraint beyond that, 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 phrase 'Карточка одного сайта' identifies the resource as a single site and then enumerates the returned areas (ссылка, доступ, SEO, версия), so an agent can guess this is a read of one site. However, there is no explicit verb ('get/retrieve') and nothing distinguishes it from siblings like vebhost_list or vebhost_settings, so the purpose stays at a vague-but-usable level.

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 at all on when to call this versus vebhost_list (list many sites) or vebhost_settings (site configuration). The agent must infer that 'one site' means a lookup by slug, with no stated prerequisites or exclusions.

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