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

No annotations are provided, so the description carries the burden. The description does not disclose side effects or the fact that most schema parameters are 'discarded' and only the URL is relevant. However, it is a simple parse operation, and the schema descriptions already hint at discarding. The description adds no behavioral context beyond the basic function.

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 waste. It front-loads the purpose and is appropriately sized for the core function.

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 parameters, but the description implies only one (url) is relevant. It does not explain why the schema includes unrelated parameters (city, feed, host, etc.) or that they are discarded. There is no output schema, and the description does not specify the return format for owner and repo. This ambiguity leaves an agent uncertain about expected inputs and outputs, making the description incomplete for a tool with such a broad schema.

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 every parameter is documented in the schema. The description does not add meaning beyond the schema; it merely restates the URL source without detailing the url parameter or clarifying that other parameters are ignored. Baseline 3 is appropriate given full schema coverage.

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 verb 'parse' and the resource 'owner and repo' from a 'GitHub URL', which is specific and distinct from sibling tools like figma-url-shape or jira-key-shape. An agent can immediately identify the tool's role.

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 implies the tool should be used when a GitHub URL is available and owner/repo are needed, but it does not explicitly state when not to use it or mention alternative tools. No exclusion criteria are provided.

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