create_repository

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

No annotations are provided, so the description carries full burden. It states the action and 'under your account' but omits details like authentication requirements, behavior on duplicate names, success/failure responses, and whether the repo is initialized with a README. This is sparse for a mutating tool.

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 concise and front-loaded with the main purpose. The Args list is cleanly formatted and avoids extra fluff. It earns its place without being verbose.

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?

While the output schema covers return values, the description lacks context for preconditions (e.g., authentication) and potential failures (e.g., name conflicts). Given the tool's mutating nature and the presence of overlapping sibling tools, it is minimally complete but leaves gaps.

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 description coverage is 0%, so the description must compensate. It does: name lists allowed characters, description notes it's shown on GitHub, and private clarifies its boolean nature. This adds meaning beyond the schema's types and defaults.

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 ('Create a new repository') and the resource ('on GitHub under your account'). It distinguishes itself from sibling tools like list_repositories and publish_project by focusing on the act of creation on GitHub.

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?

Usage is implied: use when you want to create a new GitHub repository. However, there is no explicit guidance on when to choose this over alternatives like publish_project or backup_project, and no mention of when not to use it.

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