diff --git a/src/core/tools/ReadFileTool.ts b/src/core/tools/ReadFileTool.ts
index b4ee651a6d..0093e89e08 100644
--- a/src/core/tools/ReadFileTool.ts
+++ b/src/core/tools/ReadFileTool.ts
@@ -458,7 +458,7 @@ export class ReadFileTool extends BaseTool<"read_file"> {
 								task.rooIgnoreController,
 							)
 							if (defResult) {
-								const notice = `Showing only ${maxReadFileLine} of ${totalLines} total lines. Use line_range if you need to read more lines`
+								const notice = `Showing code definitions only (0 of ${totalLines} total lines). To read file content, use the read_file tool with line_range (e.g., <line_range>1-${Math.min(500, totalLines)}</line_range>)`
 								updateFileResult(relPath, {
 									xmlContent: `<file><path>${relPath}</path>\n<list_code_definition_names>${defResult}</list_code_definition_names>\n<notice>${notice}</notice>\n</file>`,
 									nativeContent: `File: ${relPath}\nCode Definitions:\n${defResult}\n\nNote: ${notice}`,
@@ -493,7 +493,8 @@ export class ReadFileTool extends BaseTool<"read_file"> {
 								nativeInfo += `\nCode Definitions:\n${truncatedDefs}\n`
 							}
 
-							const notice = `Showing only ${maxReadFileLine} of ${totalLines} total lines. Use line_range if you need to read more lines`
+							const nextLine = maxReadFileLine + 1
+							const notice = `File truncated at line ${maxReadFileLine} of ${totalLines} total lines. To continue reading, use the read_file tool again with line_range starting at line ${nextLine} (e.g., <line_range>${nextLine}-${Math.min(nextLine + 499, totalLines)}</line_range>)`
 							xmlInfo += `<notice>${notice}</notice>\n`
 							nativeInfo += `\nNote: ${notice}`
 
diff --git a/src/core/tools/__tests__/readFileTool.spec.ts b/src/core/tools/__tests__/readFileTool.spec.ts
index d22c163636..08b0edc7ad 100644
--- a/src/core/tools/__tests__/readFileTool.spec.ts
+++ b/src/core/tools/__tests__/readFileTool.spec.ts
@@ -423,7 +423,7 @@ describe("read_file tool with maxReadFileLine setting", () => {
 			expect(result).toContain(`<list_code_definition_names>`)
 
 			// Verify XML structure
-			expect(result).toContain("<notice>Showing only 0 of 5 total lines")
+			expect(result).toContain("<notice>Showing code definitions only (0 of 5 total lines)")
 			expect(result).toContain("</notice>")
 			expect(result).toContain("<list_code_definition_names>")
 			expect(result).toContain(sourceCodeDef.trim())
@@ -450,7 +450,7 @@ describe("read_file tool with maxReadFileLine setting", () => {
 			expect(result).toContain(`<file><path>${testFilePath}</path>`)
 			expect(result).toContain(`<content lines="1-3">`)
 			expect(result).toContain(`<list_code_definition_names>`)
-			expect(result).toContain("<notice>Showing only 3 of 5 total lines")
+			expect(result).toContain("<notice>File truncated at line 3 of 5 total lines")
 		})
 
 		it("should truncate code definitions when file exceeds maxReadFileLine", async () => {
@@ -481,7 +481,7 @@ describe("read_file tool with maxReadFileLine setting", () => {
 			expect(result).not.toContain("50--60 | function bar()")
 			expect(result).not.toContain("80--90 | function baz()")
 
-			expect(result).toContain("<notice>Showing only 30 of 100 total lines")
+			expect(result).toContain("<notice>File truncated at line 30 of 100 total lines")
 		})
 
 		it("should handle truncation when all definitions are beyond the line limit", async () => {