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fivetran

Fivetran MCP Server

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by fivetran

create_transformation

Create a new transformation by providing a schema file path and a request body. Use this to define data transformations in Fivetran.

Instructions

⚠️ WRITE OPERATION - Confirm with user before calling. Creates a new transformation.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
schema_fileYesREQUIRED: You must first read the schema file at 'open-api-definitions/transformations/create_transformation.json', then provide this exact path here to confirm.
request_bodyYesJSON string containing the request body. Refer to the schema file for the expected structure.
Behavior2/5

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

The description marks it as a write operation, which hints at state change, but with no annotations provided, it lacks details on authorization needs, rate limits, or side effects. More behavioral context is needed.

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: one sentence and a warning emoji. It is front-loaded with critical information, wasting no words.

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 description is insufficient for a write operation with no annotations and no output schema. It does not explain the return value, success behavior, or prerequisites, leaving gaps in contextual completeness.

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 coverage is 100%, and the parameter descriptions in the schema are detailed. The tool description itself adds no additional meaning beyond what the schema already provides, so a baseline score of 3 is appropriate.

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 it 'creates a new transformation', which is a specific verb+resource. It is distinct from sibling tools like 'update_transformation' and 'delete_transformation', though it does not differentiate from 'create_transformation_project' which may be related.

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

Usage Guidelines3/5

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

The description includes a warning to confirm with the user before calling, which provides usage guidance. However, it does not specify when to use this tool over alternatives or when not to use it.

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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