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

No annotations are present, so the description must disclose behavioral details itself. It only says 'parse owner and repo', without clarifying behavior on invalid URLs, exact accepted URL formats, whether normalization occurs, or how the parsed result is returned. Minimal behavioral disclosure for a tool that likely validates or normalizes input.

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 clear sentence with no wasted words, and the key action is front-loaded. It lacks any structural elaboration, but for the narrow claim it makes, it is appropriately concise.

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?

With six parameters, no annotations, and no output schema, a one-sentence description is insufficient. It does not explain the expected input/output shape, the role of the other parameters, error handling, or the return value—all important for an agent to invoke this correctly among a large group of similar shape tools.

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 schema documents every parameter, so the baseline is adequately covered. The description adds one useful detail—that the URL should be a GitHub URL—which the schema's 'HTTPS URL to normalize or cite' does not specify. However, it does not clarify which parameter is the primary input or how the many other parameters relate to this tool.

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 action ('Parse'), a concrete target ('owner and repo'), and a source format ('GitHub URL'). This makes the tool's core function clear and distinguishes it from sibling shape/URL tools, though it does not explicitly name the alternative tools it is not.

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 choose this tool over nearby siblings like normalize-url, domain-shape, or figma-url-shape. The description implies the use case (parsing GitHub URLs) but gives no conditions, exclusions, or alternatives.

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