GroupClassesCreate

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

Annotations already indicate readOnlyHint=false, idempotentHint=false, and destructiveHint=false, so the mutation nature is known. The description merely restates 'create' and adds no side-effect, duplicate-handling, authorization, or response-format context; it does not contradict the annotations, but it also adds no behavioral value beyond them.

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 short sentence with no wasted words, making it easy to parse. However, it is essentially a paraphrase of the tool name and provides little beyond the minimal purpose, so it is under-specified rather than genuinely information-dense.

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 description does not explain what a group class is, what the access groups or tariff duration fields imply, what happens on success, or how this endpoint relates to the many sibling class-management tools. Required fields are in the schema, but an agent lacks enough domain context to confidently select and invoke this tool correctly.

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%, with each parameter having a Russian description, so the schema already documents the parameters. The tool description contributes no additional parameter semantics, but because the schema carries the meaning, a baseline score of 3 is appropriate.

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 action ('Create') and the resource ('a new group class'), so an agent knows the basic operation. However, it does not explicitly differentiate this from the nearby IndividualClassesCreate or GroupClassesUpdate/Delete siblings; that distinction is carried by the tool name rather than the description.

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 guidance on when to use this tool versus alternatives like GroupClassesUpdate, GroupClassesDelete, or IndividualClassesCreate. It also does not mention prerequisites such as teacher existence, access group setup, or whether these fields are authoritative, so an agent receives no decision support.

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