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 fully covered. The description contributes one useful behavioral fact beyond that: results are personalized with the calling user's progress. It says nothing about ordering, filtering, or whether the catalogue is paginated, so it is only a modest addition.

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?

A single ten-word sentence with zero filler, and the identifying scope ('this user's progress') is placed where it is read first. It is efficient, though it borders on under-specified rather than tightly informative.

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 zero-required-parameter read tool with an output schema and full annotation coverage, the description supplies the two things structured data cannot: the resource identity and the personalization of results. Usage routing is the only real gap, and that is already penalized under usage guidelines.

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 100% and the single 'lang' parameter has a fully documented enum, so the schema carries the burden. The description adds no information about language selection or defaults, which is the correct baseline when the schema is self-explanatory.

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 resource (the ABS course catalogue) and adds scope detail (it includes this user's progress), which distinguishes it from the sibling get_course that fetches a single course. It is a noun phrase rather than a verb+resource statement, so the 'list all' action is only implied by the name, but the intent is unambiguous.

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?

There is no when-to-use guidance, no prerequisites, and no mention of alternatives such as get_course for a single course or list_plans for plans. The agent must infer usage purely from the name.

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