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

It discloses a non-obvious behavioral trait: the operation is paid, costing $0.18 USDC per package, and supports up to 10 queries at a 10% discount. With no annotations, though, it does not disclose payment prerequisites, failure behavior, or what happens if more than 10 queries are supplied.

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?

The description is one compact sentence that front-loads the core purpose and batch scope, then adds pricing. There is no filler or redundant restating of the tool name.

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 simple paid batch-search tool, it covers purpose, batch size, and cost, which are the essentials. However, it leaves parameter details and return/output behavior unstated, and there is no output schema to fill that gap.

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 0%, so the description must compensate. It indirectly maps 'запросов' to the `queries` parameter and implies a batch cap of 10, but it does not define `queries` format, the `limit` parameter, or their relationship.

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 operation: Cyrillic web search in batch mode, with the concrete scope 'up to 10 queries in one payment.' This distinguishes it from `ru_search` (single search) and `ru_search_x100` (larger batch).

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?

The description implies the intended use case: batch several Cyrillic search queries together to benefit from the 10% discount and single payment. However, it never explicitly says when to prefer this tool over `ru_search` or `ru_search_x100`, nor does it provide exclusions.

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