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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false and openWorldHint=false, so the safety profile is fully covered. The description adds that the tool is scoped to one specific site's catalog and that its output feeds poisk, which is useful context. It does not describe the return shape (names vs. slugs, count), leaving a gap.

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?

Front-loaded with the resource and site, then a compact enumeration, then the one actionable instruction about poisk. The category list is long but every item earns its place by telling the agent what coverage to expect; 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?

For a zero-parameter, read-only discovery tool this is close to adequate, and the enumeration substitutes for a brief return-value description. However, with no output schema, the description never states the format of what comes back (a list of section names, slugs, or objects), which matters because those values are meant to be passed to poisk.

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?

The tool takes zero parameters, so the baseline is 4. The description mentions a 'razdel' field, but explicitly attributes it to poisk rather than to this tool, so it clarifies cross-tool data flow rather than creating false parameter expectations.

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?

Names the specific resource (catalog sections of profildoors-dver.ru) and enumerates the actual section families returned: in-stock doors, interior doors by series/finish, Invisible hidden doors, opening systems, entrance doors, mouldings and hardware. An agent can tell this is a category-listing tool and not a product search, though the verb is implicit (it restates the title 'Разделы каталога' rather than saying 'returns the list of sections').

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?

'Поле razdel передайте в poisk' explicitly routes the agent to the sibling tool and states what to do with the result, which is the key workflow decision. It stops short of saying 'call this first to discover valid razdel values before calling poisk', which would make the ordering unambiguous.

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