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

Annotations already declare readOnlyHint and openWorldHint, covering the safety profile. The description adds valuable behavioral context beyond annotations: rank range 1-100, failure if all needed segments cannot be checked, no charge on failure, and 50-point cost per call. Output shape and rate limits are still unspecified.

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-loads the core purpose, but the Korean sentence largely duplicates the English meaning, and the pricing/failure notes are separate. Every sentence is relevant, yet the bilingual redundancy reduces conciseness.

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?

No output schema exists, but the description covers success intent (rank 1-100), failure behavior, and billing. It could specify the exact return shape (e.g., rank number or not-found result), but for a two-parameter read-only tool it is mostly complete.

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 100%, so the schema already documents keyword (1-200 chars) and domain (including subdomains). The description adds no syntax or constraints beyond what the schema provides; baseline 3 applies.

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 (find where a domain ranks) and resource (Google results for a keyword) with scope (1-100). It implicitly distinguishes itself from general google_search by rank-tracking intent, even though it does not name a sibling tool.

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 when-to-use or when-not-to-use guidance, and no alternative sibling such as google_search is referenced. The implied use case is clear from the purpose, but the agent receives no routing instructions.

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