create_day

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

With no annotations provided, the description bears full responsibility for behavioral disclosure. It does not mention side effects (e.g., whether it overwrites existing days), required permissions, or what happens upon success/failure. The description only lists parameters without behavioral context.

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 extremely concise: one line of purpose followed by a clean parameter list. Every sentence is necessary and contributes to understanding. No redundancy.

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?

The description lacks information about return values (though output schema exists) and fails to explain constraints like uniqueness of date per trip or the need for an existing trip. For a creation tool, this leaves gaps for the agent.

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 coverage is 0%, so the description must add meaning. It does so by specifying the date format (YYYY-MM-DD), giving an example for title ('리스본 도착일'), and noting that content supports markdown and is optional. This adds significant value beyond the bare schema.

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 'Add a new date to the trip' (여행에 새 일자를 추가한다), which is a specific verb-resource combination. It distinguishes itself from sibling tools like update_day, delete_day, and clear_day_content by focusing on creation of a day.

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 on when to use this tool versus alternatives such as create_activity or update_day. It does not mention prerequisites (e.g., trip must exist) or exclusions. Usage is implied but not explicitly guided.

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