diff --git a/.changeset/slick-streets-stay.md b/.changeset/slick-streets-stay.md
new file mode 100644
index 000000000..9559a27c6
--- /dev/null
+++ b/.changeset/slick-streets-stay.md
@@ -0,0 +1,5 @@
+---
+'sv': patch
+---
+
+- fix(mcp): Add schema definition for Gemini MCP configuration.
diff --git a/packages/addons/_tests/mcp/test.ts b/packages/addons/_tests/mcp/test.ts
index d723bd213..9e74c9804 100644
--- a/packages/addons/_tests/mcp/test.ts
+++ b/packages/addons/_tests/mcp/test.ts
@@ -112,6 +112,7 @@ test.concurrent.for(testCases)('mcp $kind.type $variant', (testCase, ctx) => {
 			  },
 			  "gemini": {
 			    "content": {
+			      "$schema": "https://raw.githubusercontent.com/google-gemini/gemini-cli/main/schemas/settings.schema.json",
 			      "mcpServers": {
 			        "svelte": {
 			          "args": [
@@ -183,6 +184,7 @@ test.concurrent.for(testCases)('mcp $kind.type $variant', (testCase, ctx) => {
 			  },
 			  "gemini": {
 			    "content": {
+			      "$schema": "https://raw.githubusercontent.com/google-gemini/gemini-cli/main/schemas/settings.schema.json",
 			      "mcpServers": {
 			        "svelte": {
 			          "url": "https://mcp.svelte.dev/mcp",
diff --git a/packages/addons/mcp/index.ts b/packages/addons/mcp/index.ts
index 19472d51c..05c5f8a03 100644
--- a/packages/addons/mcp/index.ts
+++ b/packages/addons/mcp/index.ts
@@ -79,6 +79,8 @@ export default defineAddon({
 				filePath: '.cursor/mcp.json'
 			},
 			gemini: {
+				schema:
+					'https://raw.githubusercontent.com/google-gemini/gemini-cli/main/schemas/settings.schema.json',
 				filePath: '.gemini/settings.json'
 			},
 			opencode: {