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

Annotations already declare the mutation profile (readOnlyHint false, destructiveHint false, idempotentHint false, openWorldHint true). The description adds useful context about authentication ('signed in, or your agent key') and ownership ('you own it'), which is beyond the annotations. It does not disclose failure modes such as duplicate name handling or what exactly happens on success.

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 wasted words, which is structurally efficient. However, for a mutation tool with an undocumented parameter, this conciseness edges into under-specification rather than ideal brevity.

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 the tool's simplicity (one parameter, no output schema), the description is still incomplete because it never explains the 'name' parameter or what a successful creation returns. Annotations partially cover safety, but an agent would need more to invoke the tool confidently.

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 single required parameter 'name' has 0% schema description coverage, and the description adds no meaning about its format, uniqueness constraints, length limits, or any other semantics. The description does not compensate for the schema gap, leaving the parameter essentially undocumented.

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: 'Start a group'. It also clarifies ownership ('you own it'), giving an agent a clear sense of what the tool does. However, it does not differentiate from siblings like team_create, space_create, or group_invite_create, which prevents 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?

The description offers no guidance on when to use this tool versus alternatives. With many sibling tools for creating other entity types (e.g., team_create, space_create, org_create) and group-related tools (group_invite_create, group_remove, groups_mine), an agent has no explicit signal about when this tool is appropriate or what prerequisites exist.

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