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transform_preview

Apply field transformation rules to sample records to preview date, boolean, status, and priority mapping before full migration.

Instructions

Apply field transformation rules to a sample set of source records and return the transformed output. Use this to verify date formats, boolean normalization, status mapping, and custom transforms BEFORE running the full migration. Supports built-in presets: jira_status, jira_priority, sf_status, sf_priority.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
source_recordsYesSource records to transform
rulesYesTransformation rules to apply
Behavior3/5

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

No annotations are provided, so the description carries full burden. It implies the tool is a preview (non-destructive) but does not explicitly state it is read-only or describe side effects. Basic transparency but lacks explicit safety guarantees.

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 extremely concise: four sentences packed with purpose, usage context, and examples. No wasted words, and the most critical information is front-loaded.

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

Completeness3/5

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

Given the absence of an output schema, the description does not describe the return format or structure. For a tool with complex nested input parameters, this omission leaves a gap. However, the main use case and behavior are sufficiently covered.

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 baseline is 3. The description adds value by listing example transformation types and supported presets, which complements the schema. However, it does not explain the nuances of each rule property beyond what the schema already provides.

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

Purpose4/5

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

The description clearly states the tool applies field transformation rules to a sample set and returns transformed output. It specifies the verb 'apply', the resource 'transformation rules', and the output. However, it does not differentiate from the sibling tool 'preview_transform', which may have overlapping functionality.

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

Usage Guidelines4/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description explicitly says to use this tool to verify transforms 'BEFORE running the full migration', providing clear usage context. It also lists supported built-in presets. However, it does not mention when not to use it or alternative tools.

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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