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

The description does not disclose side effects, read-only behavior, or what happens to other inputs. The schema hints that some parameters are 'discarded', but the description remains silent, leaving behavior unclear.

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 that is easy to read. However, the overall tool specification is not concise due to the unwieldy schema with many unrelated fields.

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 description lacks essential context: it does not explain what is returned, why other parameters exist, or how they relate to the stated purpose. Without an output schema or further explanation, the tool is incompletely specified.

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?

Although the schema has 100% description coverage, many parameter descriptions (e.g., city, zone, query) are irrelevant to parsing a GitHub URL. The 'url' parameter is present but the rest are extraneous, and the description does not explain their purpose, leading to confusion.

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 owner and repo) and a specific resource (GitHub URL). However, the schema includes many unrelated parameters, which may confuse an agent about the actual scope, though the description itself is 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, nor any conditions or prerequisites. It simply states the action without context or comparison to siblings.

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