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

No annotations are present, so the description must carry full behavioral weight. It discloses that the tool requires payment and can handle up to 100 queries, but it does not state what a search returns, whether it is read-only, or any rate limits. This is insufficient for a tool with no annotation support.

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 short, but it spends its only sentence on pricing and batch size rather than on functional guidance. This is under-specification rather than concise usefulness, and the structure does not lead with the action.

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 tool with two parameters, no output schema, and no annotations, the description is incomplete. It omits parameter semantics, return behavior, and any usage examples, leaving an AI agent without enough information to invoke the tool correctly.

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%, and the description provides no explanation of the 'queries' array or 'limit' integer. An agent cannot infer what values are appropriate for these parameters, so the description fails to compensate 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?

The description identifies this as a Cyrillic web search package for up to 100 queries, which clearly distinguishes it from the sibling ru_search_x10. However, it is phrased as a noun phrase and a price tag, lacking a clear verb and a full functional explanation.

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 explicit guidance is given on when to use this tool versus ru_search or ru_search_x10. The price and batch size imply it is for large sets of queries, but the description never states that preference or mentions alternatives.

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