create_placements

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

With no annotations, the description carries the full burden, and it does disclose the single most important trait: real account money is spent. However, it says nothing about permissions required, whether purchases are reversible/cancellable, or how partial failures in a batch are handled.

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 short sentences with the action first and the financial risk second; nothing is wasted. It is efficient, though the brevity is partly under-specification rather than disciplined compression.

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?

This is a money-spending mutation whose payload is an undocumented array of free-form objects, with no annotations to fall back on. Given that complexity, the description is far too thin; only the output schema depth relieves it slightly, since return values need not be described.

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?

There is one parameter (placements) with 0% schema description coverage and a bare array of untyped objects, so the schema explains nothing. The description adds no field meaning, expected object shape, or per-item constraints, leaving the agent unable to construct a valid call from the definition alone.

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 in 'Пакетная покупка ссылок' (batch purchase of links), and the word 'Пакетная' implicitly separates it from the singular sibling create_placement. It stops short of explicitly naming that sibling, so an agent must infer the plural-vs-single split from the name alone.

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?

No when-to-use or when-not-to-use guidance is given, and create_placement is never mentioned as the alternative for single purchases. The only steering is the implicit 'batch' qualifier and a cost warning.

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