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

No annotations are provided, so the description carries the full burden. It says only 'Parse owner and repo from a GitHub URL' and does not disclose what is returned, how invalid URLs are handled, whether input is validated, or what happens to the unrelated parameters present in the schema.

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 focused sentence with no filler. It is immediately understandable and front-loads the core action.

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?

Given no annotations, no output schema, and a schema with many optional unrelated parameters, the description is too thin. It does not specify which parameter to pass, what the output looks like, or how errors are reported, leaving an agent to guess.

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 100%, so the baseline is 3. Still, the description adds no parameter mapping: it does not clarify that 'url' is the GitHub URL to parse, and the schema includes many apparently unrelated optional parameters such as city, feed, host, json, path, and query.

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 a specific action ('Parse') and a specific resource ('owner and repo from a GitHub URL'). It is distinct enough from sibling tools like figma-url-shape and jira-key-shape, though it does not explicitly name alternatives.

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 use case is implied: use this when you need to extract owner and repo from a GitHub URL. However, there is no explicit guidance about when not to use it or what alternative tools might be better for similar URL-parsing tasks.

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