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

No annotations are present, so the description must carry the behavioral burden. It only says 'parse' and does not disclose whether this is a pure local parse or a network operation, how invalid or non-GitHub URLs are handled, what output shape is returned, or that the other eight parameters are ignored or 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?

A single, front-loaded sentence with no filler. Every word contributes to the meaning.

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 tool has 9 optional parameters, no output schema, and no annotations, yet the description is only one sentence. Missing details include which parameter to populate, what the parsed owner/repo output looks like, and error behavior for malformed URLs.

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 covers 100% of parameters, establishing a baseline of 3. The description adds meaningful context that the `url` parameter is the GitHub URL from which owner/repo should be extracted, going beyond the schema's vague 'HTTPS URL to normalize or cite.'

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?

States the exact operation: parse a GitHub URL into owner and repo. The verb 'parse' plus specific resource 'GitHub URL' clearly differentiates it from sibling tools like normalize-url, jira-key-shape, and figma-url-shape.

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?

Provides no guidance on when to choose this tool over alternatives such as normalize-url, browser-url-ok, or web-fetch. The only implied context is 'when you need owner/repo from a GitHub URL,' with no exclusions or selection criteria.

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