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

Annotations already declare readOnlyHint=false, destructiveHint=true, idempotentHint=true and openWorldHint=true, so the safety profile is covered. The description adds two useful pieces of non-annotated context - the enrollment precondition (a common failure mode) and the fact that attendance can roll up into completion - but says nothing about permission requirements or what happens to a previously recorded mark, which matters for a destructive write.

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?

Three tight sentences plus the path, with the WRITE marker and the core action front-loaded. The raw endpoint string is somewhat redundant, though it does convey the ID hierarchy cheaply.

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 five-parameter destructive mutation with no output schema and no parameter descriptions, the definition covers the what and the enrollment precondition but not the ID hierarchy, permission model, or how re-marking an existing attendance behaves. Adequate to invoke, not adequate to invoke confidently.

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?

All five parameters are self-describing names and the enum for attendance is already enforced by the schema. The endpoint path does hint at the nesting order (program { program_id }, session { session_id }, meeting { meeting_id }, user { user_id }), but the description never explains that hierarchy or whether the IDs must be consistent with one another - and schema description coverage is 0%.

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 names a specific verb (mark) plus a specific resource (ILT meeting attendance) and its two terminal states. The 'WRITE:' prefix and the explicit endpoint contrast cleanly with read-oriented siblings such as axislms_list_ilt_meetings and axislms_ilt_report.

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?

It states a concrete prerequisite: 'The user must already be enrolled in the meeting,' which effectively routes the agent to axislms_enroll_user_in_ilt_session when enrollment is missing. It stops short of explicitly naming that sibling or of saying when not to use this tool (e.g., for course or learning-path completion).

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