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

No annotations are provided, so the description must bear the full burden of behavioral disclosure, and it discloses nothing. It does not mention input expectations, output shape, time complexity, stability, or side effects. An agent gets zero behavioral information beyond the tool's name.

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?

Two words ('Quick Sort: Quick Sort') contain no functional information — this is under-specification rather than conciseness. Both words are wasted restating the name, and nothing is front-loaded because there is no content to load.

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?

For a sorting tool surrounded by dozens of algorithm and sorting siblings, with no annotations and no output schema, the description is entirely inadequate. An agent cannot know what to supply, what to expect back, or how quick sort differs from heap, merge, or bubble sort. Every dimension an agent would need to invoke this correctly is absent.

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?

The input schema contains 0 parameters with trivially 100% schema coverage, which sets the baseline at 4 per the rubric. There are no parameters the description could meaningfully clarify. However, the emptiness is notable for a sort tool, since the description doesn't explain what input it operates on.

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 is the literal tautology 'Quick Sort: Quick Sort', which merely restates the tool's name. It contains no verb+resource statement of what the tool does, so an agent cannot determine that it sorts an array using the quicksort algorithm. It also provides no differentiation from sibling sorting tools such as x402-bubble-sort or x402-merge-sort.

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 gives no guidance whatsoever on when to use this tool. With numerous sorting siblings in the same family (x402-bubble-sort, x402-merge-sort, x402-heap-sort, x402-selection-sort, x402-sort-numbers, x402-sort-strings), an agent is left with no context for choosing quick sort over alternatives, and no exclusions or conditions are stated.

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