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

Annotations already declare readOnlyHint, idempotentHint, non-destructive and closed-world, so the safety profile is covered. The description adds a meaningful trait not in the annotations — 'Без персональных данных' (no personal data returned) — plus the shape of the returned data, though it omits error behavior for an invalid/unknown session_id.

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?

One compact sentence, front-loaded with the verb+resource and then the return contents; every clause carries information and nothing is padded.

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 correctly takes on the burden of naming the return contents (overall level, 10 competencies, growth zones) and the privacy guarantee. The main residual gap is how to obtain a valid session_id.

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 0% and the sole parameter is undocumented beyond its type. The description ties the report to 'session_id' but never says where that id comes from or its expected format, so it only marginally compensates for the schema gap.

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 ('Отчёт по диагностике по session_id') and enumerates the payload: overall level, 10 competency levels, growth zones. An agent can tell this apart from sibling aggregate tools like get_competencies or get_maturity_levels because it is scoped to a single diagnostic session.

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 — the session_id requirement suggests it is called after a diagnostic is completed, but the description never states when to use this versus get_competencies, get_maturity_levels, or the diagnostic_* flow, and gives no prerequisites.

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