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onion-ai

onion-mcp-server

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by onion-ai

data_table_format

Convert JSON array data into a structured Markdown table. Specify JSON string, optional headers, and alignment for clear data presentation.

Instructions

将 JSON 数组数据格式化为 Markdown 表格。

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
dataYesJSON 数组字符串,每个元素为一行数据(对象或数组)
headersNo表头列表(留空则自动从数据推断)
alignNo对齐方式: left / center / right(默认 left)left
Behavior2/5

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

With no annotations, the description should disclose behavioral traits beyond the basic operation. It does not mention error handling, input validation limits, or output characteristics, leaving ambiguity for edge cases.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is a single, clear sentence with no extraneous information. It is appropriately front-loaded and efficient.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness2/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

The tool has no output schema, yet the description does not explain the return format (Markdown table). Given the simplicity, a brief note on output would improve completeness. Currently, it relies on the title being inferred.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100%, so the baseline is 3. The description does not add meaningful information beyond what the schema already provides for each parameter.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the verb 'format' and the resource 'JSON array data into Markdown table', making the tool's purpose specific and unambiguous. It distinguishes from sibling tools like data_convert or data_json_query, which have different functions.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

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. Given sibling tools for data conversion and JSON querying, explicit usage context would help an agent decide correctly.

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

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