Create label

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

The description merely says 'creates' with no extra behavioral details. Annotations already indicate it's not read-only and not destructive, but the description adds no context about side effects, duplicate handling, permissions, or 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 concise sentence with no fluff. It is efficient, though slightly under-specified, which is acceptable given the tool's simplicity.

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 is too sparse for a tool with 4 parameters and no output schema. It does not mention project_id fallback behavior or what the tool returns, leaving important context missing.

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 tool description contains no parameter information. The schema partially documents color and project_id, but name and description are left undocumented, and the description does not compensate for this gap.

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 ('Creates') and the resource ('a project label'), which is specific and distinguishes this tool from sibling tools like gitlab_list_labels. The addition of 'project' clarifies the scope, so it's not a group-level label.

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. It does not mention prerequisites (e.g., needing an existing project) or whether to check existing labels first before creating a new one.

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