get_registered_subjects

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

No annotations are provided, so the description carries the burden of behavioral disclosure. It indicates a read operation (get all subjects) but does not elaborate on aspects like authentication requirements, data freshness, or side effects. The presence of an output schema partially mitigates the need to describe return values.

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 a single, straight-to-the-point sentence of 9 words. It is front-loaded and contains no extraneous information. Every word adds value.

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 tool with no parameters and an output schema, the description adequately covers the primary function. It specifies the scope ('this semester') which adds context. Minor gaps in usage guidelines do not severely impact completeness, as the tool is simple and the output schema can detail the response.

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 input schema has no parameters, and schema description coverage is 100% (trivial). According to the rules, baseline is 3. The description does not need to explain parameters, and it does not add parameter-specific meaning beyond the 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's function: retrieving currently registered subjects for the semester. The verb 'get' and specific resource 'registered subjects' make the purpose unambiguous, and it distinguishes well from sibling tools like 'get_timetable' or 'get_grades'.

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 guidance is provided on when to use this tool versus alternatives such as 'get_timetable' or 'get_grades'. There is no mention of prerequisites, exclusions, or context that would help an agent decide between tools.

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