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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It only says 'Parse,' which implies a read-only operation, but it does not describe error behavior for non-GitHub URLs, return format, or the fact that most schema parameters are discarded.

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 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 tool with nine schema parameters, no annotations, and no output schema, this description is too thin. It leaves unclear which parameters are actually used, what the returned owner/repo object looks like, and how invalid or non-GitHub URLs are handled.

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%, so the baseline is 3; every parameter already has a description. The tool description adds GitHub-specific intent and output fields, but it never explicitly maps the GitHub URL to the 'url' parameter or explains the presence of the many unrelated-looking 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 uses a specific verb ('Parse') and a specific resource ('owner and repo from a GitHub URL'), so the core purpose is immediately clear. It doesn't explicitly contrast with sibling tools like normalize-url or jira-key-shape, but the GitHub-specific resource strongly disambiguates it.

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 about when to use this tool versus alternatives, nor does it mention when not to use it. An agent must infer from the tool name and sibling list that this is for GitHub repo owner/repo extraction.

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