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

Annotations include only a title, so the description carries the full burden of behavioral disclosure. It reveals that a private group is created, but it does not explain permissions, side effects, return values, or how 'private' relates to the encrypted flag.

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 front-loaded sentence with no filler. Every word contributes to stating the tool's core purpose.

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 simple two-parameter create tool with complete schema coverage, the description is minimally adequate. However, with no output schema and no behavioral annotations, it leaves the agent to infer return behavior and the exact meaning of 'private'.

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 coverage is 100%, with both `name` and `encrypted` already described in the input schema. The description adds no parameter-level meaning beyond the schema, so the baseline 3 applies.

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 uses a specific verb ('Create') and resource ('private group'), and the qualifier 'private' distinguishes it from groups_read, groups_update, and groups_list. It clearly states what the tool does.

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 explicit when-to-use guidance or mention of alternatives such as groups_update or groups_list. The usage is implied by the verb and resource, but the agent receives no direct routing help.

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