2026-06-16 22:58:36 +08:00

712 lines
30 KiB
Python

#
# Copyright (C) 2026 GNS3 Technologies Inc.
# Author: Yue Guobin
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
"""
MCP tool handlers for GNS3 node management.
Handlers receive (params, gns3_ctx) and call GNS3's REST API
via Gns3Connector (from custom_gns3fy).
"""
from typing import Any
from concurrent.futures import ThreadPoolExecutor, as_completed
import logging
from gns3server.services import auth_service
log = logging.getLogger(__name__)
BATCH_MAX_WORKERS = 100
# ── Constants ──────────────────────────────────────────────────────────────
# Maximum bytes to return from get_node_file (safety net).
# Larger files are truncated with a truncated=True flag.
MAX_NODE_FILE_BYTES = 50 * 1024 # 50 KiB
# ── Helper ─────────────────────────────────────────────────────────────────
def _get_connector(gns3_ctx: dict[str, Any]):
from gns3server.agent.gns3_copilot.gns3_client.custom_gns3fy import Gns3Connector
return Gns3Connector(
url=gns3_ctx["server_url"],
jwt_token=gns3_ctx["jwt_token"],
api_version=3,
verify=False,
)
# ── Tool handlers ──────────────────────────────────────────────────────────
def get_nodes_handler(params: dict[str, Any], gns3_ctx: dict[str, Any]) -> dict[str, Any]:
project_id = params.get("project_id")
if not project_id:
return {"error": "project_id is required"}
conn = _get_connector(gns3_ctx)
nodes = conn.http_call("get", f"{conn.base_url}/projects/{project_id}/nodes").json()
fields = params.get("fields")
if fields:
if not isinstance(fields, list):
return {"error": "fields must be a list of field names, e.g. [\"name\", \"status\"]"}
invalid = [f for f in fields if f not in VALID_NODE_FIELDS]
if invalid:
return {
"error": f"Unknown fields: {invalid}",
"available_fields": sorted(VALID_NODE_FIELDS),
}
nodes = [{k: n[k] for k in fields if k in n} for n in nodes]
return {"nodes": nodes, "count": len(nodes)}
VALID_NODE_FIELDS = {
# NodeBase
"compute_id", "name", "node_type", "node_id",
"console", "console_type", "console_auto_start",
"aux", "aux_type", "properties", "label", "symbol",
"x", "y", "z", "locked",
"port_name_format", "port_segment_size", "first_port_name",
"custom_adapters", "tags",
# Node
"template_id", "project_id", "node_directory", "status",
"command_line", "width", "height", "ports", "console_host",
}
def get_node_handler(params: dict[str, Any], gns3_ctx: dict[str, Any]) -> dict[str, Any]:
project_id = params.get("project_id")
node_id = params.get("node_id")
if not project_id or not node_id:
return {"error": "project_id and node_id are required"}
conn = _get_connector(gns3_ctx)
node = conn.http_call("get", f"{conn.base_url}/projects/{project_id}/nodes/{node_id}").json()
fields = params.get("fields")
if fields:
if not isinstance(fields, list):
return {"error": "fields must be a list of field names, e.g. [\"name\", \"status\"]"}
invalid = [f for f in fields if f not in VALID_NODE_FIELDS]
if invalid:
return {
"error": f"Unknown fields: {invalid}",
"available_fields": sorted(VALID_NODE_FIELDS),
}
return {k: node[k] for k in fields if k in node}
return node
def _batch_lifecycle(project_id, node_ids, action, conn, action_label):
"""Helper to run a lifecycle action on multiple nodes in parallel."""
def _act(nid):
try:
conn.http_call("post", f"{conn.base_url}/projects/{project_id}/nodes/{nid}/{action}")
return {"node_id": nid, "status": "success", "message": f"Node {nid} {action_label}"}
except Exception as e:
return {"node_id": nid, "status": "error", "error": str(e)}
with ThreadPoolExecutor(max_workers=min(len(node_ids), BATCH_MAX_WORKERS)) as pool:
return list(pool.map(_act, node_ids))
def start_node_handler(params: dict[str, Any], gns3_ctx: dict[str, Any]) -> dict[str, Any]:
project_id = params.get("project_id")
if not project_id:
return {"error": "project_id is required"}
node_ids = params.get("node_ids")
if node_ids:
if not isinstance(node_ids, list):
return {"error": "node_ids must be a list"}
conn = _get_connector(gns3_ctx)
return _batch_lifecycle(project_id, node_ids, "start", conn, "started")
node_id = params.get("node_id")
if not node_id:
return {"error": "node_id or node_ids is required"}
conn = _get_connector(gns3_ctx)
conn.http_call("post", f"{conn.base_url}/projects/{project_id}/nodes/{node_id}/start", json_data={})
return {"message": f"Node {node_id} started", "node_id": node_id}
def stop_node_handler(params: dict[str, Any], gns3_ctx: dict[str, Any]) -> dict[str, Any]:
project_id = params.get("project_id")
if not project_id:
return {"error": "project_id is required"}
node_ids = params.get("node_ids")
if node_ids:
if not isinstance(node_ids, list):
return {"error": "node_ids must be a list"}
conn = _get_connector(gns3_ctx)
return _batch_lifecycle(project_id, node_ids, "stop", conn, "stopped")
node_id = params.get("node_id")
if not node_id:
return {"error": "node_id or node_ids is required"}
conn = _get_connector(gns3_ctx)
conn.http_call("post", f"{conn.base_url}/projects/{project_id}/nodes/{node_id}/stop", json_data={})
return {"message": f"Node {node_id} stopped", "node_id": node_id}
def reload_node_handler(params: dict[str, Any], gns3_ctx: dict[str, Any]) -> dict[str, Any]:
project_id = params.get("project_id")
if not project_id:
return {"error": "project_id is required"}
node_ids = params.get("node_ids")
if node_ids:
if not isinstance(node_ids, list):
return {"error": "node_ids must be a list"}
conn = _get_connector(gns3_ctx)
return _batch_lifecycle(project_id, node_ids, "reload", conn, "reloaded")
node_id = params.get("node_id")
if not node_id:
return {"error": "node_id or node_ids is required"}
conn = _get_connector(gns3_ctx)
conn.http_call("post", f"{conn.base_url}/projects/{project_id}/nodes/{node_id}/reload")
return {"message": f"Node {node_id} reloaded", "node_id": node_id}
def suspend_node_handler(params: dict[str, Any], gns3_ctx: dict[str, Any]) -> dict[str, Any]:
project_id = params.get("project_id")
if not project_id:
return {"error": "project_id is required"}
node_ids = params.get("node_ids")
if node_ids:
if not isinstance(node_ids, list):
return {"error": "node_ids must be a list"}
conn = _get_connector(gns3_ctx)
return _batch_lifecycle(project_id, node_ids, "suspend", conn, "suspended")
node_id = params.get("node_id")
if not node_id:
return {"error": "node_id or node_ids is required"}
conn = _get_connector(gns3_ctx)
conn.http_call("post", f"{conn.base_url}/projects/{project_id}/nodes/{node_id}/suspend")
return {"message": f"Node {node_id} suspended", "node_id": node_id}
def _filter_node_response(node: dict, fields: list[str] = None) -> dict:
"""Filter node response to only include requested fields."""
if not fields:
fields = ["node_id", "name", "node_type", "status", "console"]
return {k: node[k] for k in fields if k in node}
def create_node_handler(params: dict[str, Any], gns3_ctx: dict[str, Any]) -> dict[str, Any]:
project_id = params.get("project_id")
if not project_id:
return {"error": "project_id is required"}
fields = params.get("fields")
if fields is not None and not isinstance(fields, list):
return {"error": "fields must be a list, e.g. [\"node_id\", \"name\"]"}
nodes = params.get("nodes")
# Batch mode: nodes=[{template_id?, x, y, name?, compute_id?}]
# When top-level template_id is set, it applies to all nodes as a default
if nodes is not None:
if not isinstance(nodes, list) or not nodes:
return {"error": "nodes must be a non-empty array"}
default_tid = params.get("template_id")
results = []
conn = _get_connector(gns3_ctx)
def _create_one(node_data):
tid = node_data.get("template_id", default_tid)
if not tid:
return {"template_id": tid, "status": "error", "error": "template_id is required"}
try:
url = f"{conn.base_url}/projects/{project_id}/templates/{tid}"
body = {
"x": node_data.get("x", 0),
"y": node_data.get("y", 0),
"compute_id": node_data.get("compute_id", "local"),
}
node_name = node_data.get("name")
if node_name:
body["name"] = node_name
resp = conn.http_call("post", url, json_data=body).json()
return {"template_id": tid, "status": "success", "node": _filter_node_response(resp, fields)}
except Exception as e:
return {"template_id": tid, "status": "error", "error": str(e)}
with ThreadPoolExecutor(max_workers=min(len(nodes), BATCH_MAX_WORKERS)) as pool:
futures = {pool.submit(_create_one, n): n for n in nodes}
for future in as_completed(futures):
results.append(future.result())
return results
# Single mode
template_id = params.get("template_id")
if not template_id:
return {"error": "template_id is required"}
conn = _get_connector(gns3_ctx)
data = {
"x": params.get("x", 0),
"y": params.get("y", 0),
"compute_id": params.get("compute_id", "local"),
}
node_name = params.get("name")
if node_name:
data["name"] = node_name
url = f"{conn.base_url}/projects/{project_id}/templates/{template_id}"
resp = conn.http_call("post", url, json_data=data).json()
return _filter_node_response(resp, fields)
def delete_node_handler(params: dict[str, Any], gns3_ctx: dict[str, Any]) -> dict[str, Any]:
project_id = params.get("project_id")
if not project_id:
return {"error": "project_id is required"}
node_ids = params.get("node_ids")
if node_ids:
if not isinstance(node_ids, list):
return {"error": "node_ids must be a list"}
conn = _get_connector(gns3_ctx)
def _del(nid):
try:
conn.http_call("delete", f"{conn.base_url}/projects/{project_id}/nodes/{nid}")
return {"node_id": nid, "status": "deleted"}
except Exception as e:
return {"node_id": nid, "status": "error", "error": str(e)}
with ThreadPoolExecutor(max_workers=min(len(node_ids), BATCH_MAX_WORKERS)) as pool:
return list(pool.map(_del, node_ids))
node_id = params.get("node_id")
if not node_id:
return {"error": "node_id or node_ids is required"}
conn = _get_connector(gns3_ctx)
conn.http_call("delete", f"{conn.base_url}/projects/{project_id}/nodes/{node_id}")
return {"message": f"Node {node_id} deleted", "node_id": node_id}
def update_node_handler(params: dict[str, Any], gns3_ctx: dict[str, Any]) -> dict[str, Any]:
project_id = params.get("project_id")
node_id = params.get("node_id")
if not project_id or not node_id:
return {"error": "project_id and node_id are required"}
conn = _get_connector(gns3_ctx)
# Extract update parameters - handle nested kwargs structure from MCP clients
if "kwargs" in params and isinstance(params["kwargs"], dict):
update_data = params["kwargs"]
else:
update_data = {k: v for k, v in params.items() if k not in ("project_id", "node_id", "kwargs")}
url = f"{conn.base_url}/projects/{project_id}/nodes/{node_id}"
return conn.http_call("put", url, json_data=update_data).json()
def get_node_console_info_handler(params: dict[str, Any], gns3_ctx: dict[str, Any]) -> dict[str, Any]:
project_id = params.get("project_id")
node_id = params.get("node_id")
if not project_id or not node_id:
return {"error": "project_id and node_id are required"}
conn = _get_connector(gns3_ctx)
node = conn.http_call("get", f"{conn.base_url}/projects/{project_id}/nodes/{node_id}").json()
console_type = node.get("console_type", "unknown")
# Short-lived JWT for the WebSocket URL (10 min)
username = gns3_ctx.get("jwt_username")
ws_token = auth_service.create_access_token(username, expires_in=10) if username else None
raw_url = f"{gns3_ctx['server_url']}/v3/projects/{project_id}/nodes/{node_id}/console/ws"
if ws_token:
raw_url += f"?token={ws_token}"
# Convert http scheme to ws for direct websocat usage
ws_url = raw_url.replace("https://", "wss://").replace("http://", "ws://")
result = {
"node_id": node_id,
"node_name": node.get("name"),
"console_type": console_type,
"ws_url": ws_url,
"command": f"websocat {ws_url}",
}
if console_type in ("vnc",):
result["vnc_url"] = f"/v3/projects/{project_id}/nodes/{node_id}/console/vnc?token={gns3_ctx['jwt_token']}"
return result
# ── Node file handlers ────────────────────────────────────────────────────
def list_node_files_handler(params: dict[str, Any], gns3_ctx: dict[str, Any]) -> dict[str, Any]:
project_id = params.get("project_id")
node_id = params.get("node_id")
if not project_id or not node_id:
return {"error": "project_id and node_id are required"}
conn = _get_connector(gns3_ctx)
url = f"{conn.base_url}/projects/{project_id}/nodes/{node_id}/files"
query = {}
if params.get("path"):
query["path"] = params["path"]
if params.get("recursive"):
query["recursive"] = "true"
files = conn.http_call("get", url, params=query if query else None).json()
return {"files": files, "count": len(files)}
def get_node_file_handler(params: dict[str, Any], gns3_ctx: dict[str, Any]) -> dict[str, Any]:
project_id = params.get("project_id")
node_id = params.get("node_id")
file_path = params.get("file_path")
if not project_id or not node_id or not file_path:
return {"error": "project_id, node_id and file_path are required"}
offset = params.get("offset", 0)
limit = params.get("limit", 200)
conn = _get_connector(gns3_ctx)
url = f"{conn.base_url}/projects/{project_id}/nodes/{node_id}/files/{file_path}"
raw = conn.http_call("get", url).text
total_bytes = len(raw.encode("utf-8"))
truncated = False
if total_bytes > MAX_NODE_FILE_BYTES:
raw = raw[:MAX_NODE_FILE_BYTES]
truncated = True
lines = raw.splitlines(keepends=False)
total_lines = len(lines)
# Apply offset/limit
selected = lines[offset: offset + limit] if offset < total_lines else []
has_more = (offset + limit) < total_lines or truncated
return {
"file_path": file_path,
"content": "\n".join(selected),
"metadata": {
"total_lines": total_lines,
"total_bytes": total_bytes,
"offset": offset,
"limit": limit,
"returned_lines": len(selected),
"returned_bytes": len("\n".join(selected).encode("utf-8")),
"truncated": truncated or has_more,
"has_more": has_more,
},
}
def write_node_file_handler(params: dict[str, Any], gns3_ctx: dict[str, Any]) -> dict[str, Any]:
project_id = params.get("project_id")
node_id = params.get("node_id")
file_path = params.get("file_path")
content = params.get("content")
if not project_id or not node_id or not file_path or content is None:
return {"error": "project_id, node_id, file_path and content are required"}
conn = _get_connector(gns3_ctx)
url = f"{conn.base_url}/projects/{project_id}/nodes/{node_id}/files/{file_path}"
conn.http_call("post", url, data=content, headers={"Content-Type": "text/plain"})
return {"message": f"File {file_path} written to node {node_id}", "file_path": file_path, "node_id": node_id}
def delete_node_file_handler(params: dict[str, Any], gns3_ctx: dict[str, Any]) -> dict[str, Any]:
project_id = params.get("project_id")
node_id = params.get("node_id")
file_path = params.get("file_path")
if not project_id or not node_id or not file_path:
return {"error": "project_id, node_id and file_path are required"}
conn = _get_connector(gns3_ctx)
url = f"{conn.base_url}/projects/{project_id}/nodes/{node_id}/files/{file_path}"
conn.http_call("delete", url)
return {"message": f"File {file_path} deleted from node {node_id}", "file_path": file_path, "node_id": node_id}
# ── Node bulk / advanced handlers ────────────────────────────────────
def start_all_nodes_handler(params: dict[str, Any], gns3_ctx: dict[str, Any]) -> dict[str, Any]:
project_id = params.get("project_id")
if not project_id:
return {"error": "project_id is required"}
conn = _get_connector(gns3_ctx)
conn.http_call("post", f"{conn.base_url}/projects/{project_id}/nodes/start")
return {"message": "All nodes started", "project_id": project_id}
def stop_all_nodes_handler(params: dict[str, Any], gns3_ctx: dict[str, Any]) -> dict[str, Any]:
project_id = params.get("project_id")
if not project_id:
return {"error": "project_id is required"}
conn = _get_connector(gns3_ctx)
conn.http_call("post", f"{conn.base_url}/projects/{project_id}/nodes/stop")
return {"message": "All nodes stopped", "project_id": project_id}
def suspend_all_nodes_handler(params: dict[str, Any], gns3_ctx: dict[str, Any]) -> dict[str, Any]:
project_id = params.get("project_id")
if not project_id:
return {"error": "project_id is required"}
conn = _get_connector(gns3_ctx)
conn.http_call("post", f"{conn.base_url}/projects/{project_id}/nodes/suspend")
return {"message": "All nodes suspended", "project_id": project_id}
def reload_all_nodes_handler(params: dict[str, Any], gns3_ctx: dict[str, Any]) -> dict[str, Any]:
project_id = params.get("project_id")
if not project_id:
return {"error": "project_id is required"}
conn = _get_connector(gns3_ctx)
conn.http_call("post", f"{conn.base_url}/projects/{project_id}/nodes/reload")
return {"message": "All nodes reloaded", "project_id": project_id}
def duplicate_node_handler(params: dict[str, Any], gns3_ctx: dict[str, Any]) -> dict[str, Any]:
project_id = params.get("project_id")
node_id = params.get("node_id")
if not project_id or not node_id:
return {"error": "project_id and node_id are required"}
conn = _get_connector(gns3_ctx)
data = {k: v for k, v in params.items() if k not in ("project_id", "node_id") and v is not None}
result = conn.http_call("post", f"{conn.base_url}/projects/{project_id}/nodes/{node_id}/duplicate", json_data=data).json()
return {"message": f"Node {node_id} duplicated", "node": result}
def isolate_node_handler(params: dict[str, Any], gns3_ctx: dict[str, Any]) -> dict[str, Any]:
project_id = params.get("project_id")
node_id = params.get("node_id")
if not project_id or not node_id:
return {"error": "project_id and node_id are required"}
conn = _get_connector(gns3_ctx)
conn.http_call("post", f"{conn.base_url}/projects/{project_id}/nodes/{node_id}/isolate")
return {"message": f"Node {node_id} isolated (all links suspended)", "node_id": node_id}
def unisolate_node_handler(params: dict[str, Any], gns3_ctx: dict[str, Any]) -> dict[str, Any]:
project_id = params.get("project_id")
node_id = params.get("node_id")
if not project_id or not node_id:
return {"error": "project_id and node_id are required"}
conn = _get_connector(gns3_ctx)
conn.http_call("post", f"{conn.base_url}/projects/{project_id}/nodes/{node_id}/unisolate")
return {"message": f"Node {node_id} unisolated (links resumed)", "node_id": node_id}
def get_node_links_handler(params: dict[str, Any], gns3_ctx: dict[str, Any]) -> dict[str, Any]:
project_id = params.get("project_id")
node_id = params.get("node_id")
if not project_id or not node_id:
return {"error": "project_id and node_id are required"}
conn = _get_connector(gns3_ctx)
links = conn.http_call("get", f"{conn.base_url}/projects/{project_id}/nodes/{node_id}/links").json()
return {"links": links, "count": len(links)}
# ── Tool definitions ───────────────────────────────────────────────────────
NODE_TOOLS = [
{
"name": "get_nodes",
"description": "List all nodes in a project",
"parameters": {
"type": "object",
"properties": {
"project_id": {"type": "string", "description": "Project UUID"},
},
"required": ["project_id"],
},
"handler": get_nodes_handler,
},
{
"name": "get_node",
"description": "Get detailed information about a specific node",
"parameters": {
"type": "object",
"properties": {
"project_id": {"type": "string", "description": "Project UUID"},
"node_id": {"type": "string", "description": "Node UUID"},
},
"required": ["project_id", "node_id"],
},
"handler": get_node_handler,
},
{
"name": "start_node",
"description": "Start a node in a project",
"parameters": {
"type": "object",
"properties": {
"project_id": {"type": "string", "description": "Project UUID"},
"node_id": {"type": "string", "description": "Node UUID"},
},
"required": ["project_id", "node_id"],
},
"handler": start_node_handler,
},
{
"name": "stop_node",
"description": "Stop a node in a project",
"parameters": {
"type": "object",
"properties": {
"project_id": {"type": "string", "description": "Project UUID"},
"node_id": {"type": "string", "description": "Node UUID"},
},
"required": ["project_id", "node_id"],
},
"handler": stop_node_handler,
},
{
"name": "reload_node",
"description": "Reload (restart) a node in a project",
"parameters": {
"type": "object",
"properties": {
"project_id": {"type": "string", "description": "Project UUID"},
"node_id": {"type": "string", "description": "Node UUID"},
},
"required": ["project_id", "node_id"],
},
"handler": reload_node_handler,
},
{
"name": "suspend_node",
"description": "Suspend a node in a project",
"parameters": {
"type": "object",
"properties": {
"project_id": {"type": "string", "description": "Project UUID"},
"node_id": {"type": "string", "description": "Node UUID"},
},
"required": ["project_id", "node_id"],
},
"handler": suspend_node_handler,
},
{
"name": "create_node",
"description": "Create a new node from a template in a project",
"parameters": {
"type": "object",
"properties": {
"project_id": {"type": "string", "description": "Project UUID"},
"template_id": {"type": "string", "description": "Template UUID"},
"x": {"type": "integer", "description": "X coordinate (optional)"},
"y": {"type": "integer", "description": "Y coordinate (optional)"},
"compute_id": {"type": "string", "description": "Compute ID (optional, default: local)"},
},
"required": ["project_id", "template_id"],
},
"handler": create_node_handler,
},
{
"name": "delete_node",
"description": "Delete a node from a project",
"parameters": {
"type": "object",
"properties": {
"project_id": {"type": "string", "description": "Project UUID"},
"node_id": {"type": "string", "description": "Node UUID"},
},
"required": ["project_id", "node_id"],
},
"handler": delete_node_handler,
},
{
"name": "update_node",
"description": "Update a node's properties (name, position, etc.)",
"parameters": {
"type": "object",
"properties": {
"project_id": {"type": "string", "description": "Project UUID"},
"node_id": {"type": "string", "description": "Node UUID"},
"name": {"type": "string", "description": "New node name (optional)"},
"x": {"type": "integer", "description": "New X position (optional)"},
"y": {"type": "integer", "description": "New Y position (optional)"},
"compute_id": {"type": "string", "description": "Compute ID (optional)"},
},
"required": ["project_id", "node_id"],
},
"handler": update_node_handler,
},
{
"name": "get_node_console_info",
"description": "Get console WebSocket URL for a node (use websocat to connect)",
"parameters": {
"type": "object",
"properties": {
"project_id": {"type": "string", "description": "Project UUID"},
"node_id": {"type": "string", "description": "Node UUID"},
},
"required": ["project_id", "node_id"],
},
"handler": get_node_console_info_handler,
},
{
"name": "list_node_files",
"description": "List files in a node directory with metadata (name, size, type, modified time). "
"Use recursive=true for a full recursive listing. "
"Check file sizes before reading large files with get_node_file.",
"parameters": {
"type": "object",
"properties": {
"project_id": {"type": "string", "description": "Project UUID"},
"node_id": {"type": "string", "description": "Node UUID"},
"path": {"type": "string", "description": "Subdirectory path within node directory (optional)"},
"recursive": {"type": "boolean", "description": "Recursively list all files (optional, default: false)"},
},
"required": ["project_id", "node_id"],
},
"handler": list_node_files_handler,
},
{
"name": "get_node_file",
"description": "Read a text file from a node directory. Returns file content line-by-line with offset/limit support. "
"Best practice: start with offset=0, limit=200 to preview, then increase offset to read more. "
"Large files (>50KB) are auto-truncated; check the metadata.truncated flag. "
"For binary files, check file type via list_node_files first.",
"parameters": {
"type": "object",
"properties": {
"project_id": {"type": "string", "description": "Project UUID"},
"node_id": {"type": "string", "description": "Node UUID"},
"file_path": {"type": "string", "description": "Path to the file within the node directory"},
"offset": {"type": "integer", "description": "Line offset to start reading from (optional, default: 0)"},
"limit": {"type": "integer", "description": "Maximum number of lines to return (optional, default: 200)"},
},
"required": ["project_id", "node_id", "file_path"],
},
"handler": get_node_file_handler,
},
{
"name": "write_node_file",
"description": "Write content to a file in a node directory. Creates the file if it doesn't exist. "
"Overwrites existing content. Useful for updating configuration files on nodes.",
"parameters": {
"type": "object",
"properties": {
"project_id": {"type": "string", "description": "Project UUID"},
"node_id": {"type": "string", "description": "Node UUID"},
"file_path": {"type": "string", "description": "Path to the file within the node directory"},
"content": {"type": "string", "description": "Content to write to the file"},
},
"required": ["project_id", "node_id", "file_path", "content"],
},
"handler": write_node_file_handler,
},
{
"name": "delete_node_file",
"description": "Delete a file from a node directory. Cannot be undone. "
"Use list_node_files to confirm the file path before deleting.",
"parameters": {
"type": "object",
"properties": {
"project_id": {"type": "string", "description": "Project UUID"},
"node_id": {"type": "string", "description": "Node UUID"},
"file_path": {"type": "string", "description": "Path to the file within the node directory"},
},
"required": ["project_id", "node_id", "file_path"],
},
"handler": delete_node_file_handler,
},
]