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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=false, so the safety profile is covered. The description's only added behavioral information is the past-and-future temporal scope; it says nothing about ordering, pagination, limits, or what fields each class record carries.

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?

One short sentence with the scope qualifier in plain view and no filler. It is efficient, though so terse that it borders on under-specification rather than being genuinely well-structured.

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 single-parameter read tool with no output schema, the description covers the essentials of what is listed and the time horizon. It leaves gaps on result shape, ordering, and volume, which matter because the tool returns 'all' classes with no stated bound.

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?

There is a single parameter with 100% schema coverage, and the schema itself explains it comes from list_students. The description adds no further semantics about the identifier or filtering, which is the expected baseline when the schema does the work.

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 concrete resource (classes and appointments) for a single student and adds a useful scope qualifier (past and future). It is clear what the tool returns, but it does not distinguish itself from closely related siblings such as list_student_sessions or get_schedule, so an agent must infer the boundary.

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 never states when to reach for this tool versus the many overlapping siblings (list_student_sessions, get_schedule, list_class_change_requests). Usage is only implied by the name and the phrase 'of one student'; there are no exclusions or alternatives given.

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