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

With no annotations, the description carries the full behavioral burden, and it discloses almost nothing: no indication of whether the header row is preserved, whether sorting is lexicographic or numeric, or what the returned value looks like. For a pure transformation tool this is a real gap, though the operation itself is low-risk.

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 short sentences, front-loaded with the purpose before the input hints. No wasted words, though the alias parenthetical makes the second sentence slightly dense.

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 simple stateless transform with no output schema, the description is roughly adequate, but it omits how the redundant data/text parameters map to the csv input and gives no hint about the returned sorted CSV. Minor but noticeable incompleteness given six interchangeable-looking parameters.

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 property descriptions are boilerplate ('Column to process', 'Csv to process'), so they add no meaning. The description compensates partially by clarifying the col/column alias and that order=desc means descending. It says nothing about the data/text aliases that duplicate the csv input, leaving ambiguity.

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 states a specific verb and resource: 'Sort CSV data by a specified column.' That is unambiguous and lets an agent distinguish it from sibling tools like x402-csv-filter or x402-csv-parse. It stops short of naming any alternative, so it is clear but not sibling-differentiating.

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?

Usage is only implied by the name and the sort action; there is no explicit when-to-use or when-not guidance. It hints at required inputs ('provide csv text and column') but does not route the agent toward or away from any sibling tool.

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