feat!: upgrade to latest MCP protocol (2025-06-18)

Cargo.toml

@@ -15,10 +15,10 @@ license = false
 eula = false
 
 [dependencies]
-rust-mcp-sdk = { version = "0.4", default-features = false, features = [
+rust-mcp-sdk = { version = "0.5", default-features = false, features = [
     "server",
     "macros",
-    "2025_03_26",
+    "2025_06_18",
 ] }
 
 thiserror = { version = "2.0" }

src/server.rs

@@ -11,6 +11,7 @@ pub fn server_details() -> InitializeResult {
         server_info: Implementation {
             name: "rust-mcp-filesystem".to_string(),
             version: env!("CARGO_PKG_VERSION").to_string(),
+            title:Some("Filesystem MCP Server: fast and efficient tools for managing filesystem operations.".to_string())
         },
         capabilities: ServerCapabilities {
             experimental: None,

src/tools/create_directory.rs

@@ -1,12 +1,14 @@
 use std::path::Path;
 
 use rust_mcp_sdk::macros::{mcp_tool, JsonSchema};
+use rust_mcp_sdk::schema::TextContent;
 use rust_mcp_sdk::schema::{schema_utils::CallToolError, CallToolResult};
 
 use crate::fs_service::FileSystemService;
 
 #[mcp_tool(
     name = "create_directory",
+    title="Create Directory",
     description = concat!("Create a new directory or ensure a directory exists. ",
     "Can create multiple nested directories in one operation. ",
     "If the directory already exists, this operation will succeed silently. ",
@@ -33,9 +35,8 @@ impl CreateDirectoryTool {
             .await
             .map_err(CallToolError::new)?;
 
-        Ok(CallToolResult::text_content(
+        Ok(CallToolResult::text_content(vec![TextContent::from(
             format!("Successfully created directory {}", &params.path),
-            None,
-        ))
+        )]))
     }
 }

src/tools/directory_tree.rs

@@ -1,4 +1,5 @@
 use rust_mcp_sdk::macros::{mcp_tool, JsonSchema};
+use rust_mcp_sdk::schema::TextContent;
 use rust_mcp_sdk::schema::{schema_utils::CallToolError, CallToolResult};
 use serde_json::json;
 
@@ -7,6 +8,7 @@ use crate::fs_service::FileSystemService;
 
 #[mcp_tool(
     name = "directory_tree",
+    title= "Directory Tree",
     description = concat!("Get a recursive tree view of files and directories as a JSON structure. ",
     "Each entry includes 'name', 'type' (file/directory), and 'children' for directories. ",
     "Files have no children array, while directories always have a children array (which may be empty). ",
@@ -47,6 +49,8 @@ impl DirectoryTreeTool {
         }
 
         let json_str = serde_json::to_string_pretty(&json!(entries)).map_err(CallToolError::new)?;
-        Ok(CallToolResult::text_content(json_str, None))
+        Ok(CallToolResult::text_content(vec![TextContent::from(
+            json_str,
+        )]))
     }
 }

src/tools/edit_file.rs

@@ -1,6 +1,7 @@
 use std::path::Path;
 
 use rust_mcp_sdk::macros::{mcp_tool, JsonSchema};
+use rust_mcp_sdk::schema::TextContent;
 use rust_mcp_sdk::schema::{schema_utils::CallToolError, CallToolResult};
 
 use crate::fs_service::FileSystemService;
@@ -18,6 +19,7 @@ pub struct EditOperation {
 
 #[mcp_tool(
     name = "edit_file",
+    title="Edit File",
     description = concat!("Make line-based edits to a text file. ",
     "Each edit replaces exact line sequences with new content. ",
     "Returns a git-style diff showing the changes made. ",
@@ -53,6 +55,6 @@ impl EditFileTool {
             .await
             .map_err(CallToolError::new)?;
 
-        Ok(CallToolResult::text_content(diff, None))
+        Ok(CallToolResult::text_content(vec![TextContent::from(diff)]))
     }
 }

src/tools/get_file_info.rs

@@ -1,12 +1,14 @@
 use std::path::Path;
 
 use rust_mcp_sdk::macros::{mcp_tool, JsonSchema};
+use rust_mcp_sdk::schema::TextContent;
 use rust_mcp_sdk::schema::{schema_utils::CallToolError, CallToolResult};
 
 use crate::fs_service::FileSystemService;
 
 #[mcp_tool(
     name = "get_file_info",
+    title="Get File Info",
     description = concat!("Retrieve detailed metadata about a file or directory. ",
     "Returns comprehensive information including size, creation time, ",
     "last modified time, permissions, and type. ",
@@ -32,6 +34,8 @@ impl GetFileInfoTool {
             .get_file_stats(Path::new(&params.path))
             .await
             .map_err(CallToolError::new)?;
-        Ok(CallToolResult::text_content(stats.to_string(), None))
+        Ok(CallToolResult::text_content(vec![TextContent::from(
+            stats.to_string(),
+        )]))
     }
 }

src/tools/list_allowed_directories.rs

@@ -1,10 +1,12 @@
 use rust_mcp_sdk::macros::{mcp_tool, JsonSchema};
+use rust_mcp_sdk::schema::TextContent;
 use rust_mcp_sdk::schema::{schema_utils::CallToolError, CallToolResult};
 
 use crate::fs_service::FileSystemService;
 
 #[mcp_tool(
     name = "list_allowed_directories",
+    title="List Allowed Directories",
     description = concat!("Returns a list of directories that the server has permission ",
     "to access Subdirectories within these allowed directories are also accessible. ",
     "Use this to identify which directories and their nested paths are available ",
@@ -31,6 +33,8 @@ impl ListAllowedDirectoriesTool {
                 .collect::<Vec<_>>()
                 .join("\n")
         );
-        Ok(CallToolResult::text_content(result, None))
+        Ok(CallToolResult::text_content(vec![TextContent::from(
+            result,
+        )]))
     }
 }

src/tools/list_directory.rs

@@ -1,12 +1,14 @@
 use std::path::Path;
 
 use rust_mcp_sdk::macros::{mcp_tool, JsonSchema};
+use rust_mcp_sdk::schema::TextContent;
 use rust_mcp_sdk::schema::{schema_utils::CallToolError, CallToolResult};
 
 use crate::fs_service::FileSystemService;
 
 #[mcp_tool(
     name = "list_directory",
+    title="List Directory",
     description = concat!("Get a detailed listing of all files and directories in a specified path. ",
 "Results clearly distinguish between files and directories with [FILE] and [DIR] ",
 "prefixes. This tool is essential for understanding directory structure and ",
@@ -47,6 +49,8 @@ impl ListDirectoryTool {
             })
             .collect();
 
-        Ok(CallToolResult::text_content(formatted.join("\n"), None))
+        Ok(CallToolResult::text_content(vec![TextContent::from(
+            formatted.join("\n"),
+        )]))
     }
 }

src/tools/list_directory_with_sizes.rs

@@ -1,4 +1,5 @@
 use rust_mcp_sdk::macros::{mcp_tool, JsonSchema};
+use rust_mcp_sdk::schema::TextContent;
 use rust_mcp_sdk::schema::{schema_utils::CallToolError, CallToolResult};
 use std::fmt::Write;
 use std::path::Path;
@@ -8,6 +9,7 @@ use crate::fs_service::FileSystemService;
 
 #[mcp_tool(
     name = "list_directory_with_sizes",
+    title="List Directory With File Sizes",
     description = concat!("Get a detailed listing of all files and directories in a specified path, including sizes. " ,
         "Results clearly distinguish between files and directories with [FILE] and [DIR] prefixes. " ,
         "This tool is useful for understanding directory structure and " ,
@@ -86,6 +88,8 @@ impl ListDirectoryWithSizesTool {
             .format_directory_entries(entries)
             .await
             .map_err(CallToolError::new)?;
-        Ok(CallToolResult::text_content(output, None))
+        Ok(CallToolResult::text_content(vec![TextContent::from(
+            output,
+        )]))
     }
 }

src/tools/move_file.rs

@@ -1,12 +1,14 @@
 use std::path::Path;
 
 use rust_mcp_sdk::macros::{mcp_tool, JsonSchema};
+use rust_mcp_sdk::schema::TextContent;
 use rust_mcp_sdk::schema::{schema_utils::CallToolError, CallToolResult};
 
 use crate::fs_service::FileSystemService;
 
 #[mcp_tool(
     name = "move_file",
+    title="Move File",
     description = concat!("Move or rename files and directories. Can move files between directories ",
 "and rename them in a single operation. If the destination exists, the ",
 "operation will fail. Works across different directories and can be used ",
@@ -35,12 +37,11 @@ impl MoveFileTool {
             .await
             .map_err(CallToolError::new)?;
 
-        Ok(CallToolResult::text_content(
+        Ok(CallToolResult::text_content(vec![TextContent::from(
             format!(
                 "Successfully moved {} to {}",
                 &params.source, &params.destination
             ),
-            None,
-        ))
+        )]))
     }
 }

src/tools/read_files.rs

@@ -1,12 +1,14 @@
 use std::path::Path;
 
 use rust_mcp_sdk::macros::{mcp_tool, JsonSchema};
+use rust_mcp_sdk::schema::TextContent;
 use rust_mcp_sdk::schema::{schema_utils::CallToolError, CallToolResult};
 
 use crate::fs_service::FileSystemService;
 
 #[mcp_tool(
     name = "read_file",
+    title="Read File",
     description = concat!("Read the complete contents of a file from the file system. ",
     "Handles various text encodings and provides detailed error messages if the ",
     "file cannot be read. Use this tool when you need to examine the contents of ",
@@ -32,6 +34,8 @@ impl ReadFileTool {
             .await
             .map_err(CallToolError::new)?;
 
-        Ok(CallToolResult::text_content(content, None))
+        Ok(CallToolResult::text_content(vec![TextContent::from(
+            content,
+        )]))
     }
 }

src/tools/read_multiple_files.rs

@@ -2,12 +2,14 @@ use std::path::Path;
 
 use futures::future::join_all;
 use rust_mcp_sdk::macros::{mcp_tool, JsonSchema};
+use rust_mcp_sdk::schema::TextContent;
 use rust_mcp_sdk::schema::{schema_utils::CallToolError, CallToolResult};
 
 use crate::fs_service::FileSystemService;
 
 #[mcp_tool(
     name = "read_multiple_files",
+    title="Read Multiple Files",
     description = concat!("Read the contents of multiple files simultaneously. ",
     "This is more efficient than reading files one by one when you need to analyze ",
     "or compare multiple files. Each file's content is returned with its ",
@@ -49,6 +51,8 @@ impl ReadMultipleFilesTool {
 
         let contents = join_all(content_futures).await;
 
-        Ok(CallToolResult::text_content(contents.join("\n---\n"), None))
+        Ok(CallToolResult::text_content(vec![TextContent::from(
+            contents.join("\n---\n"),
+        )]))
     }
 }