version: "1.0"
# MCP Server Metadata
server:
name: "fileUtils" # Required: unique identifier
version: "1.0.0" # Required: server version
title: "File utilities" # Optional: display name (defaults to name if not provided)
instructions: "This server provides file utility tools for counting files and calculating total file sizes in directories." # Optional
# MCP Servers used by the graph
mcpServers:
# Stdio server (type is optional, defaults to stdio)
filesystem:
command: "npx"
args:
- "-y"
- "@modelcontextprotocol/server-filesystem"
- "../mcpGraph/tests/counting"
# Example: Streamable HTTP server (preferred for HTTP/SSE)
# httpServer:
# type: "streamableHttp"
# url: "https://api.example.com/mcp"
# headers:
# Authorization: "Bearer token"
# X-Custom-Header: "value"
# Tool Definitions
tools:
- name: "count_files"
description: "Counts the number of files in a directory"
inputSchema:
type: "object"
properties:
directory:
type: "string"
description: "The directory path to count files in"
required:
- directory
outputSchema:
type: "object"
properties:
count:
type: "number"
description: "The number of files in the directory"
nodes:
# Entry node: Receives tool arguments
- id: "entry"
type: "entry"
next: "list_directory_node"
# List directory contents
- id: "list_directory_node"
type: "mcp"
server: "filesystem"
tool: "list_directory"
args:
path:
expr: "$.entry.directory"
next: "count_files_node"
# Transform and count files
- id: "count_files_node"
type: "transform"
transform:
expr: '{ "count": $count($split($.list_directory_node.content, "\n")) }'
next: "exit"
# Exit node: Returns the count
- id: "exit"
type: "exit"
- name: "sum_file_sizes"
description: "Sums the size of all files in a directory"
inputSchema:
type: "object"
properties:
directory:
type: "string"
description: "The directory path to sum file sizes in"
required:
- directory
outputSchema:
type: "object"
properties:
totalSize:
type: "number"
description: "The total size of all files in bytes"
nodes:
# Entry node: Receives tool arguments
- id: "entry"
type: "entry"
next: "list_directory_with_sizes_node"
# List directory contents with file sizes
- id: "list_directory_with_sizes_node"
type: "mcp"
server: "filesystem"
tool: "list_directory_with_sizes"
args:
path:
expr: "$.entry.directory"
next: "sum_sizes_node"
# Transform and sum file sizes
- id: "sum_sizes_node"
type: "transform"
transform:
expr: |
(
$lines := $split($.list_directory_with_sizes_node.content, "\n");
$fileLines := $lines[$substring($, 0, 6) = "[FILE]"];
{
"totalSize": $sum($fileLines. (
$parts := $split($trim($), " ");
$sizeStr := $parts[$count($parts) - 2] & " " & $parts[$count($parts) - 1];
$number := $number($replace($sizeStr, /[^0-9.]/, ""));
$unit := $replace($sizeStr, /[0-9.]/, "");
$number * (
$unit = "TB" ? 1099511627776 :
$unit = "GB" ? 1073741824 :
$unit = "MB" ? 1048576 :
$unit = "KB" ? 1024 : 1
)
))
}
)
next: "exit"
# Exit node: Returns the total size
- id: "exit"
type: "exit"
