create_repository

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

Annotations only include openWorldHint, with no readOnly or destructive hints, so the description carries the burden. The description discloses that the tool changes remote GitLab state, requires permissions, and returns validation/conflict/permission/rate-limit errors rather than silently failing. It does not describe the return payload, but no output schema is present.

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 first two sentences are useful and front-loaded with purpose and behavior, but the third sentence is boilerplate referencing nonexistent parameters and pagination. The description is longer than necessary for a create tool whose schema already documents every parameter.

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 covers what the tool does, when to use it, its side effects, and error handling, which is sufficient given the fully described schema. It omits return format, but since there is no output schema and errors are explicitly addressed, no critical context is 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?

Input schema descriptions cover 100% of parameters with clear meanings, so the baseline is 3. The description's third sentence references project_id/group_id and pagination fields that are not in the schema, adding no value and potentially distracting from the actual parameters.

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 opens with the imperative 'Create a new GitLab project,' clearly stating the verb and resource. It explicitly contrasts with update/edit tools for existing resources, making selection unambiguous among many sibling tools.

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?

It gives an explicit condition: use this tool for a new resource, and choose the corresponding update or edit tool when the resource already exists. It also states permission requirements and error outcomes, providing clear when-to-use guidance.

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