create_group

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

No annotations are provided, so the description carries the full behavioral burden, yet it discloses nothing beyond the basic create action. It does not state whether the creator becomes an admin, whether the group is immediately visible, what identifiers are returned, or any auth/rate-limit constraints for a write operation.

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 single sentence is front-loaded and free of padding, which is structurally fine. But for a write tool with a nested payload, one bare sentence is under-specified rather than appropriately concise.

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?

Given a mutation tool with no annotations, no output schema, and a nested required object, the description is far too thin. An agent learns nothing about the response, side effects, or constraints it needs to call this 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?

Top-level schema coverage is reported at 0% (the 'data' wrapper itself is undocumented), and the description adds no parameter meaning at all. The nested subject/description/participants fields do carry inline schema descriptions, which partially compensates, but the description itself contributes nothing to help an agent populate the payload.

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 states a specific verb and resource ('Cria um novo grupo' = creates a new group), which is clear and distinct from mutation siblings like update_group or add_participants. However, it makes no explicit effort to differentiate itself from the many other group tools, so it stops short of a 5.

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 (update_group, list_groups, add_participants), no prerequisites, and no mention of what happens after creation. The agent must infer usage entirely from the tool name.

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