diff --git a/CHANGELOG.md b/CHANGELOG.md
index 748659b90a7..5ee3d69a119 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,2 +1,3 @@
 - Added `functions.list_functions` as a MCP tool (#9369)
 - Added AI Logic to `firebase init` CLI command and `firebase_init` MCP tool. (#9185)
+- Improved error messages for Firebase AI Logic provisioning during 'firebase init' (#9377)
diff --git a/src/management/provisioning/errorHandler.spec.ts b/src/management/provisioning/errorHandler.spec.ts
new file mode 100644
index 00000000000..ecd6784984d
--- /dev/null
+++ b/src/management/provisioning/errorHandler.spec.ts
@@ -0,0 +1,251 @@
+import { expect } from "chai";
+import { FirebaseError } from "../../error";
+import { enhanceProvisioningError } from "./errorHandler";
+
+describe("errorHandler", () => {
+  describe("enhanceProvisioningError", () => {
+    it("should include ErrorInfo details in error message", () => {
+      const originalError = new FirebaseError("Permission denied", {
+        context: {
+          body: {
+            error: {
+              code: 403,
+              message: "The user has not accepted the terms of service.",
+              status: "PERMISSION_DENIED",
+              details: [
+                {
+                  "@type": "type.googleapis.com/google.rpc.ErrorInfo",
+                  reason:
+                    "TOS_REQUIRED: The following ToS's must be accepted: [generative-language-api].",
+                  domain: "firebase.googleapis.com",
+                },
+              ],
+            },
+          },
+        },
+      });
+
+      const result = enhanceProvisioningError(originalError, "Failed to provision Firebase app");
+
+      expect(result).to.be.instanceOf(FirebaseError);
+      expect(result.message).to.include("Failed to provision Firebase app: Permission denied");
+      expect(result.message).to.include("Error details:");
+      expect(result.message).to.include(
+        "Reason: TOS_REQUIRED: The following ToS's must be accepted: [generative-language-api].",
+      );
+      expect(result.message).to.include("Domain: firebase.googleapis.com");
+      expect(result.exit).to.equal(2);
+      expect(result.original).to.equal(originalError);
+    });
+
+    it("should include HelpLinks in error message", () => {
+      const originalError = new FirebaseError("Permission denied", {
+        context: {
+          body: {
+            error: {
+              code: 403,
+              message: "The user has not accepted the terms of service.",
+              status: "PERMISSION_DENIED",
+              details: [
+                {
+                  "@type": "type.googleapis.com/google.rpc.Help",
+                  links: [
+                    {
+                      description: "Link to accept Generative Language terms of service",
+                      url: "https://console.cloud.google.com/apis/library/generativelanguage.googleapis.com?authuser=0&forceCheckTos=true",
+                    },
+                  ],
+                },
+              ],
+            },
+          },
+        },
+      });
+
+      const result = enhanceProvisioningError(originalError, "Failed to provision Firebase app");
+
+      expect(result.message).to.include("For help resolving this issue:");
+      expect(result.message).to.include("Link to accept Generative Language terms of service");
+      expect(result.message).to.include(
+        "https://console.cloud.google.com/apis/library/generativelanguage.googleapis.com?authuser=0&forceCheckTos=true",
+      );
+    });
+
+    it("should include both ErrorInfo and HelpLinks in error message", () => {
+      const originalError = new FirebaseError("Permission denied", {
+        context: {
+          body: {
+            error: {
+              code: 403,
+              message: "The user has not accepted the terms of service.",
+              status: "PERMISSION_DENIED",
+              details: [
+                {
+                  "@type": "type.googleapis.com/google.rpc.ErrorInfo",
+                  reason:
+                    "TOS_REQUIRED: The following ToS's must be accepted: [generative-language-api].",
+                  domain: "firebase.googleapis.com",
+                },
+                {
+                  "@type": "type.googleapis.com/google.rpc.Help",
+                  links: [
+                    {
+                      description: "Link to accept Generative Language terms of service",
+                      url: "https://console.cloud.google.com/apis/library/generativelanguage.googleapis.com?authuser=0&forceCheckTos=true",
+                    },
+                  ],
+                },
+              ],
+            },
+          },
+        },
+      });
+
+      const result = enhanceProvisioningError(originalError, "Failed to provision Firebase app");
+
+      // Verify ErrorInfo is included
+      expect(result.message).to.include("Error details:");
+      expect(result.message).to.include(
+        "Reason: TOS_REQUIRED: The following ToS's must be accepted: [generative-language-api].",
+      );
+      expect(result.message).to.include("Domain: firebase.googleapis.com");
+
+      // Verify HelpLinks are included
+      expect(result.message).to.include("For help resolving this issue:");
+      expect(result.message).to.include("Link to accept Generative Language terms of service");
+    });
+
+    it("should include ErrorInfo with metadata in error message", () => {
+      const originalError = new FirebaseError("Invalid request", {
+        context: {
+          body: {
+            error: {
+              code: 400,
+              message: "Invalid request",
+              status: "INVALID_ARGUMENT",
+              details: [
+                {
+                  "@type": "type.googleapis.com/google.rpc.ErrorInfo",
+                  reason: "INVALID_FIELD",
+                  domain: "firebase.googleapis.com",
+                  metadata: {
+                    field: "displayName",
+                    constraint: "max_length",
+                  },
+                },
+              ],
+            },
+          },
+        },
+      });
+
+      const result = enhanceProvisioningError(originalError, "Operation failed");
+
+      expect(result.message).to.include("Reason: INVALID_FIELD");
+      expect(result.message).to.include("Domain: firebase.googleapis.com");
+      expect(result.message).to.include("Additional Info:");
+      expect(result.message).to.include("field");
+    });
+
+    it("should include multiple help links in error message", () => {
+      const originalError = new FirebaseError("Multiple help links", {
+        context: {
+          body: {
+            error: {
+              code: 403,
+              message: "Permission denied",
+              status: "PERMISSION_DENIED",
+              details: [
+                {
+                  "@type": "type.googleapis.com/google.rpc.Help",
+                  links: [
+                    {
+                      description: "First help link",
+                      url: "https://example.com/help1",
+                    },
+                    {
+                      description: "Second help link",
+                      url: "https://example.com/help2",
+                    },
+                  ],
+                },
+              ],
+            },
+          },
+        },
+      });
+
+      const result = enhanceProvisioningError(originalError, "Operation failed");
+
+      expect(result.message).to.include("First help link");
+      expect(result.message).to.include("https://example.com/help1");
+      expect(result.message).to.include("Second help link");
+      expect(result.message).to.include("https://example.com/help2");
+    });
+
+    it("should handle errors without details gracefully", () => {
+      const originalError = new FirebaseError("Firebase error without details", {
+        context: {
+          body: {
+            error: {
+              code: 400,
+              message: "Bad Request",
+              status: "INVALID_ARGUMENT",
+            },
+          },
+        },
+      });
+
+      const result = enhanceProvisioningError(originalError, "Operation failed");
+
+      expect(result).to.be.instanceOf(FirebaseError);
+      expect(result.message).to.equal("Operation failed: Firebase error without details");
+      expect(result.exit).to.equal(2);
+    });
+
+    it("should handle non-Error types gracefully", () => {
+      const result = enhanceProvisioningError("String error", "Operation failed");
+
+      expect(result).to.be.instanceOf(FirebaseError);
+      expect(result.message).to.equal("Operation failed: String error");
+      expect(result.exit).to.equal(2);
+      expect(result.original).to.be.instanceOf(Error);
+    });
+
+    it("should handle regular Error without context", () => {
+      const regularError = new Error("Regular error");
+
+      const result = enhanceProvisioningError(regularError, "Context message");
+
+      expect(result).to.be.instanceOf(FirebaseError);
+      expect(result.message).to.equal("Context message: Regular error");
+      expect(result.original).to.equal(regularError);
+    });
+
+    it("should ignore unknown detail types", () => {
+      const originalError = new FirebaseError("Unknown detail type", {
+        context: {
+          body: {
+            error: {
+              code: 500,
+              message: "Internal error",
+              status: "INTERNAL",
+              details: [
+                {
+                  "@type": "type.googleapis.com/google.rpc.UnknownType",
+                  someField: "someValue",
+                },
+              ],
+            },
+          },
+        },
+      });
+
+      const result = enhanceProvisioningError(originalError, "Operation failed");
+
+      expect(result.message).to.equal("Operation failed: Unknown detail type");
+      expect(result.message).to.not.include("Error details:");
+      expect(result.message).to.not.include("For help");
+    });
+  });
+});
diff --git a/src/management/provisioning/errorHandler.ts b/src/management/provisioning/errorHandler.ts
new file mode 100644
index 00000000000..e60da66bc99
--- /dev/null
+++ b/src/management/provisioning/errorHandler.ts
@@ -0,0 +1,112 @@
+import { FirebaseError, getError } from "../../error";
+
+/**
+ * Google RPC ErrorInfo structure
+ */
+interface ErrorInfo {
+  "@type": "type.googleapis.com/google.rpc.ErrorInfo";
+  reason: string;
+  domain: string;
+  metadata?: Record<string, string>;
+}
+
+/**
+ * Google RPC Help structure with links
+ */
+interface HelpLinks {
+  "@type": "type.googleapis.com/google.rpc.Help";
+  links: Array<{
+    description: string;
+    url: string;
+  }>;
+}
+
+/**
+ * Error detail can be ErrorInfo, HelpLinks, or other types
+ */
+type ErrorDetail = ErrorInfo | HelpLinks | Record<string, unknown>;
+
+/**
+ * Provisioning API error structure
+ */
+interface ProvisioningError {
+  error: {
+    code: number;
+    message: string;
+    status: string;
+    details?: ErrorDetail[];
+  };
+}
+
+/**
+ * Type guard for ErrorInfo
+ */
+function isErrorInfo(detail: ErrorDetail): detail is ErrorInfo {
+  return detail["@type"] === "type.googleapis.com/google.rpc.ErrorInfo";
+}
+
+/**
+ * Type guard for HelpLinks
+ */
+function isHelpLinks(detail: ErrorDetail): detail is HelpLinks {
+  return detail["@type"] === "type.googleapis.com/google.rpc.Help";
+}
+
+/**
+ * Extracts detailed error information from a provisioning API error response.
+ * Returns a formatted string with error details and help links.
+ */
+function extractErrorDetails(err: unknown): string {
+  if (!(err instanceof Error)) {
+    return "";
+  }
+
+  // Check if this is a FirebaseError with context containing provisioning error
+  if (err instanceof FirebaseError && err.context) {
+    const context = err.context as { body?: ProvisioningError };
+    const errorBody = context.body?.error;
+
+    if (errorBody?.details && Array.isArray(errorBody.details)) {
+      const parts: string[] = [];
+
+      for (const detail of errorBody.details) {
+        if (isErrorInfo(detail)) {
+          parts.push(`Error details:`);
+          parts.push(`  Reason: ${detail.reason}`);
+          parts.push(`  Domain: ${detail.domain}`);
+          if (detail.metadata) {
+            parts.push(`  Additional Info: ${JSON.stringify(detail.metadata)}`);
+          }
+        } else if (isHelpLinks(detail)) {
+          parts.push(`\nFor help resolving this issue:`);
+          for (const link of detail.links) {
+            parts.push(`  - ${link.description}`);
+            parts.push(`    ${link.url}`);
+          }
+        }
+      }
+
+      return parts.length > 0 ? `\n\n${parts.join("\n")}` : "";
+    }
+  }
+
+  return "";
+}
+
+/**
+ * Enhances an error with detailed information from provisioning API responses.
+ * This function extracts error details and includes them in the error message.
+ */
+export function enhanceProvisioningError(err: unknown, contextMessage: string): FirebaseError {
+  const originalError = getError(err);
+  const errorDetails = extractErrorDetails(err);
+
+  const fullMessage = errorDetails
+    ? `${contextMessage}: ${originalError.message}${errorDetails}`
+    : `${contextMessage}: ${originalError.message}`;
+
+  return new FirebaseError(fullMessage, {
+    exit: 2,
+    original: originalError,
+  });
+}
diff --git a/src/management/provisioning/provision.ts b/src/management/provisioning/provision.ts
index 463aebe294a..3379d41eb2a 100644
--- a/src/management/provisioning/provision.ts
+++ b/src/management/provisioning/provision.ts
@@ -5,6 +5,7 @@ import { logger } from "../../logger";
 import { pollOperation } from "../../operation-poller";
 import { AppPlatform } from "../apps";
 import * as types from "./types";
+import { enhanceProvisioningError } from "./errorHandler";
 
 const apiClient = new Client({
   urlPrefix: firebaseApiOrigin(),
@@ -133,10 +134,6 @@ export async function provisionFirebaseApp(
     logger.debug("[provision] Firebase app provisioning completed successfully");
     return result;
   } catch (err: unknown) {
-    const errorMessage = err instanceof Error ? err.message : String(err);
-    throw new FirebaseError(`Failed to provision Firebase app: ${errorMessage}`, {
-      exit: 2,
-      original: err instanceof Error ? err : new Error(String(err)),
-    });
+    throw enhanceProvisioningError(err, "Failed to provision Firebase app");
   }
 }