ncloud_get_contract_usage_list_by_daily

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

Annotations already indicate readOnlyHint=true, and the description adds the 3-month range limit. No contradictions. However, it does not disclose behavior for invalid inputs, pagination, or potential throttling, which would enhance transparency further.

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 concise sentences, front-loaded with the main verb and resource. Every word serves a purpose. No fluff or unnecessary detail.

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 12 parameters and no output schema, the description is brief. It explains the output type (daily usage breakdown per contract) but lacks details on response format, common use cases, or how to interpret results. Given the complexity and lack of output schema, more context would be beneficial.

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 all 12 parameters. The description only reiterates the date-range concept and the 3-month limit, which is also in the schema. It adds no new semantic meaning beyond what the schema provides, meeting the baseline for high-coverage schemas.

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 clearly states it retrieves daily contract usage breakdowns for a date range, which is specific and informative. However, it does not explicitly distinguish itself from the sibling 'ncloud_get_contract_usage_list', which likely provides a non-daily aggregation, so clarity is high but not maximal.

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?

Provides the key usage constraint of a 3-month date range limit, which is helpful. However, it offers no guidance on when to use this tool versus other billing-related siblings (e.g., ncloud_get_contract_usage_list), nor does it specify prerequisites or ideal scenarios.

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