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

No annotations are provided, so the description carries the full behavioral burden, and it discloses nothing. It does not state sort order (ascending vs descending), whether the result is numeric or lexicographic, how non-numeric tokens are handled, or whether the input is mutated. For an unannotated tool this is a complete gap.

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?

There is nothing to trim, but the two-word phrasing is under-specification rather than conciseness; the sentence does not earn its place because it adds no information beyond the tool name. Brevity only helps when the required meaning is present.

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 no annotations, no output schema, and a single vague parameter, the description had to supply input format, ordering behavior, and return shape. It supplies none of them, leaving the agent unable to call the tool with confidence.

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 coverage is nominally 100%, but the single schema description is the content-free placeholder "Values to process", and the tool description adds nothing, so the agent still cannot tell whether 'values' is a delimited string, a JSON array, or space-separated numbers. The nominal coverage provides no real semantic information here.

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 a pure restatement of the name: "Sort Numbers: Sort numbers." There is no verb-plus-resource specificity beyond what the tool name already conveys, and no distinguishing detail against siblings such as x402-sort-lines, x402-sort-strings, or x402-sorted-array. This is the classic tautology case.

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?

No when-to-use guidance is given, and no alternatives are named even though the sibling list contains near-identical sort tools (sort-lines, sort-strings). Nothing tells the agent how to choose among them. It is not misleading, just silent.

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