Cursor Talk to Figma MCP

Instructions

Implementation Reference

• src/talk_to_figma_mcp/server.ts:1330-1372 (registration)

  Full registration of the 'set_corner_radius' tool including schema definition, input validation with Zod, and the handler function that proxies the command to the Figma plugin via sendCommandToFigma.
  server.tool( "set_corner_radius", "Set the corner radius of a node in Figma", { nodeId: z.string().describe("The ID of the node to modify"), radius: z.number().min(0).describe("Corner radius value"), corners: z .array(z.boolean()) .length(4) .optional() .describe( "Optional array of 4 booleans to specify which corners to round [topLeft, topRight, bottomRight, bottomLeft]" ), }, async ({ nodeId, radius, corners }) => { try { const result = await sendCommandToFigma("set_corner_radius", { nodeId, radius, corners: corners || [true, true, true, true], }); const typedResult = result as { name: string }; return { content: [ { type: "text", text: `Set corner radius of node "${typedResult.name}" to ${radius}px`, }, ], }; } catch (error) { return { content: [ { type: "text", text: `Error setting corner radius: ${error instanceof Error ? error.message : String(error) }`, }, ], }; } } );
• src/talk_to_figma_mcp/server.ts:1344-1371 (handler)

  The handler function executes the tool logic: sends 'set_corner_radius' command to Figma plugin with parameters, handles response or error, and returns MCP-formatted content.
  async ({ nodeId, radius, corners }) => { try { const result = await sendCommandToFigma("set_corner_radius", { nodeId, radius, corners: corners || [true, true, true, true], }); const typedResult = result as { name: string }; return { content: [ { type: "text", text: `Set corner radius of node "${typedResult.name}" to ${radius}px`, }, ], }; } catch (error) { return { content: [ { type: "text", text: `Error setting corner radius: ${error instanceof Error ? error.message : String(error) }`, }, ], }; } }
• src/talk_to_figma_mcp/server.ts:1333-1343 (schema)

  Zod schema for input validation: requires nodeId and radius (non-negative number), optional corners array of exactly 4 booleans.
  { nodeId: z.string().describe("The ID of the node to modify"), radius: z.number().min(0).describe("Corner radius value"), corners: z .array(z.boolean()) .length(4) .optional() .describe( "Optional array of 4 booleans to specify which corners to round [topLeft, topRight, bottomRight, bottomLeft]" ), },
• src/talk_to_figma_mcp/server.ts:286-288 (helper)

  In filterFigmaNode helper function, preserves cornerRadius property when filtering node data for responses.
  if (node.cornerRadius !== undefined) { filtered.cornerRadius = node.cornerRadius; }