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Claude Talk to Figma MCP

Claude Talk to Figma MCP

by arinspunk
OverviewSchemaSourceRelated ServersDiscussionsAdmin
TypeScript
Local

replace_image_fill

Replace an existing image fill on a Figma node with a new image from a URL or base64 data, preserving its current transform.

Instructions

Replace existing image on node with new image while preserving transform

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "nodeId": "<nodeId>",
      "newImageSource": "<newImageSource>",
      "sourceType": "<sourceType>"
    },
    "name": "replace_image_fill"
  }
}

Input Schema

NameRequiredDescriptionDefault
nodeIdYesThe ID of the node with image to replace
newImageSourceYesNew image URL or base64 data
sourceTypeYesSource type: 'url' or 'base64'
preserveTransformNoPreserve existing image transform (default: true)

Schema Changelog

Changes observed during successful MCP inspections.

  1. Addedv0.8.2

TDQS

A3.5/5.0
Behavior3/5

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

With no annotations, the description must disclose behavioral traits. It notes that transform is preserved, which is useful, but omits other traits like what happens if no existing image, auth needs, or side effects. The description adds some context beyond the name but is minimal.

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 sentence that is direct and efficient, containing no redundant or irrelevant information. Every word contributes.

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?

For a 4-parameter tool with no output schema and no annotations, the description is somewhat sparse. It covers the core action but lacks details on transform preservation semantics, error conditions, or the return value. It is minimally adequate.

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%, so each parameter is already described in the schema. The description adds no additional parameter-specific meaning beyond what the schema provides. The baseline of 3 applies.

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 "Replace existing image on node with new image while preserving transform" clearly states the action (replace) and the resource (image on node). It provides a specific verb and resource, distinguishing it from generic set operations. However, it does not explicitly differentiate from the sibling tool 'set_image_fill'.

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 implies usage when you want to replace an image while keeping its transform, but it provides no explicit guidance on when to use this vs. alternatives like set_image_fill, nor does it mention prerequisites or when not to use.

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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