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 only states the action but does not disclose behavior such as validation rules, error handling, return format, or how irrelevant parameters are treated. The schema descriptions for discarded parameters hint at behavior, but the description itself adds no transparency.

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 concise sentence with no wasted words. It is efficiently worded, though it lacks structure such as sections or examples. The conciseness is appropriate, but the structure is minimal.

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 9 parameters, none required, no output schema, and no annotations, the description is far too minimal. It does not explain what the tool returns, which parameters are relevant, or how to invoke it correctly. The presence of many unrelated parameters increases confusion, and the description fails to resolve it.

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?

While schema description coverage is 100%, the parameter descriptions are generic and mostly unrelated to the tool's purpose (city, feed, host, json, path, etc.). The description does not clarify which parameter (likely 'url') is primary or how the others should be handled. It adds little meaning beyond the schema.

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 'Parse owner and repo from a GitHub URL' clearly states the verb (parse), resource (owner and repo from a GitHub URL), and distinguishes it from sibling tools like domain-shape or figma-url-shape. It is specific and unambiguous.

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 provides no guidance on when to use this tool versus alternatives. It does not mention any conditions, exclusions, or alternative tools, leaving the agent without context for selection.

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