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Fivetran MCP Server

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by fivetran

update_transformation

Updates an existing transformation by providing its unique identifier and a request body with the desired changes.

Instructions

⚠️ WRITE OPERATION - Confirm with user before calling. Updates the transformation if a valid identifier is provided.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
schema_fileYesREQUIRED: You must first read the schema file at 'open-api-definitions/transformations/update_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.
transformation_idYesThe unique identifier for the transformation
Behavior3/5

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It states it's a write operation and requires a valid identifier, but lacks details on side effects, error behavior, or idempotency. The warning enhances transparency but leaves gaps.

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 concise sentence with a warning symbol, front-loading the critical safety information. Every word earns its place; no redundancy or extraneous detail.

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?

Given the lack of output schema and annotations, the description is incomplete. It does not mention return values, error handling, or prerequisites (e.g., existence of the transformation). The warning and valid-ID condition are necessary but insufficient for a mutation tool.

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 parameters are already documented. The description adds minimal semantic value beyond the schema, only reinforcing the need for a valid identifier. The baseline score of 3 is appropriate.

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 tool's action ('Updates the transformation') and explicitly labels it as a write operation, distinguishing it from read-only or creation siblings like 'create_transformation' and 'delete_transformation'.

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 is helpful for safety, but it does not provide explicit guidance on when to use this tool versus alternatives (e.g., create, delete) or note prerequisites.

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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