create_activity

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

With no annotations, the description carries full burden. It only states the tool adds an activity, with no disclosure of behavioral traits like validation, return value, side effects, or authorization requirements. This is minimal for a creation tool.

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 moderately concise but contains redundancy (e.g., '선택' repeated for each optional parameter). It is structured with bullet points, which aids readability, but could be trimmed slightly.

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 parameter list is complete and includes examples, but the description doesn't cover return values (despite an output schema) or prerequisites like ensuring trip_id and day_id exist. It mentions checking day_id from get_trip, which is helpful, but overall context is adequate but not thorough.

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%, but the description provides detailed semantics for each parameter, including examples and allowed values for category and reservation_status. This compensates well for the lack of schema descriptions, adding 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 the tool adds an activity to a day, and the parameter list specifies what fields are involved. However, it does not explicitly differentiate from siblings like update_activity or delete_activity, so it slightly misses full clarity.

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 others. The description mentions that day_id can be confirmed from get_trip, but it doesn't specify prerequisites or scenarios where create_activity is preferred over update_activity.

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