create_attendance_session

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It mentions that 'start' defaults to now and that is_hidden hides the session from students, but it does not disclose permissions required, whether creation is reversible, or potential side effects like duplicate sessions. The tool's behavior is mostly opaque.

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 concise and front-loaded with the one-line purpose. The Args section is well-structured with each parameter on its own line, and every sentence adds value. It loses one point because the 'Args:' block is a somewhat verbose format for what could be more compact, but it remains clear and efficient.

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 tool has a simple create semantics and an output schema, so return value explanations are not needed. The description provides sufficient parameter guidance and a prerequisite hint (list_courses), but it does not mention permissions, error conditions, or relationship to other actions. It feels minimally adequate but not rich in context.

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?

The description adds significant meaning beyond the schema, which has 0% parameter descriptions. It explains course_id with a lookup hint, gives a title example, specifies the ISO 8601 format for start with a concrete example and default behavior, and clarifies that is_hidden controls student visibility. This covers all four parameters comprehensively.

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's function: 'Create a new attendance session in a course.' It uses a specific verb (create) and resource (attendance session), and the verb distinguishes it from sibling tools like update_attendance_session and delete_attendance_session.

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?

The description gives a useful hint for looking up course_id via list_courses, but it does not explicitly state when to use this tool versus alternatives or when not to use it. The usage is implied by the create action, but no exclusions or conditions are provided.

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