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create_rectangle

Generate a rectangle in Figma by specifying dimensions, position, and optional attributes like name or parent node, using the MCP server for programmatic design updates.

Instructions

Create a new rectangle in Figma

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
heightYesHeight of the rectangle
nameNoOptional name for the rectangle
parentIdNoOptional parent node ID to append the rectangle to
widthYesWidth of the rectangle
xYesX position
yYesY position

Implementation Reference

  • MCP tool registration, schema, and handler implementation for the 'create_rectangle' tool. The handler forwards parameters to the Figma plugin's create_rectangle command via sendCommandToFigma and handles the response, returning a formatted message with the created rectangle details or an error.
    server.tool(
      "create_rectangle",
      "Create a new rectangle in Figma",
      {
        x: z.number().describe("X position"),
        y: z.number().describe("Y position"),
        width: z.number().describe("Width of the rectangle"),
        height: z.number().describe("Height of the rectangle"),
        name: z.string().optional().describe("Optional name for the rectangle"),
        parentId: z
          .string()
          .optional()
          .describe("Optional parent node ID to append the rectangle to"),
      },
      async ({ x, y, width, height, name, parentId }: any) => {
        try {
          const result = await sendCommandToFigma("create_rectangle", {
            x,
            y,
            width,
            height,
            name: name || "Rectangle",
            parentId,
          });
          return {
            content: [
              {
                type: "text",
                text: `Created rectangle "${JSON.stringify(result)}"`,
              },
            ],
          };
        } catch (error) {
          return {
            content: [
              {
                type: "text",
                text: `Error creating rectangle: ${error instanceof Error ? error.message : String(error)
                  }`,
              },
            ],
          };
        }
      }
    );
Behavior2/5

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

No annotations are provided, so the description carries full burden. It states 'Create' which implies a write/mutation operation, but doesn't disclose behavioral traits like permissions needed, whether it's destructive to existing elements, rate limits, or what happens on success/failure. This leaves significant gaps for a mutation tool.

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, efficient sentence that directly states the tool's purpose without any wasted words. It's appropriately sized and front-loaded, making it easy to parse quickly.

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?

For a mutation tool with no annotations and no output schema, the description is incomplete. It doesn't explain what the tool returns (e.g., the new rectangle's ID), error conditions, or behavioral context like how it interacts with Figma's document structure. This leaves the agent with insufficient information for reliable use.

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 all parameters are documented in the schema. The description adds no additional meaning about parameters beyond implying creation of a rectangle, which aligns with the schema. This meets the baseline of 3 when schema coverage is high.

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 action ('Create a new rectangle') and the resource ('in Figma'), which is specific and unambiguous. However, it doesn't distinguish this tool from other creation tools like 'create_frame' or 'create_text' in the sibling list, which would require mentioning what makes rectangles unique (e.g., geometric shape with width/height).

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. With siblings like 'create_frame' and 'create_text', there's no indication of when a rectangle is appropriate (e.g., for basic shapes vs. containers or text elements), nor any prerequisites or exclusions mentioned.

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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