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Redfish MCP Server

Overview

The Redfish MCP Server is a natural language interface designed for agentic applications to efficiently manage infrastructure that exposes Redfish API for this purpose. It integrates seamlessly with MCP (Model Content Protocol) clients, enabling AI-driven workflows to interact with structured and unstructured data of the infrastructure. Using this MCP Server, you can ask questions like:

  • "List the available infrastructure components"

  • "Get the data of ethernet interfaces of the infrastructure component X"

Related MCP server: Hyperfabric MCP Server

Features

  • Natural Language Queries: Enables AI agents to query the data of infrastructure components using natural language.

  • Seamless MCP Integration: Works with any MCP client for smooth communication.

  • Full Redfish Support: It wraps the Python Redfish library

Tools

This MCP Server provides tools to manage the data of infrastructure via the Redfish API.

  • list_servers to query the Redfish API endpoints that are configured for the MCP Server.

  • list_discovered_servers to review Redfish endpoints discovered via SSDP. Discovered endpoints are candidates only and are not managed until explicitly added to REDFISH_HOSTS.

  • get_resource_data to read the data of a specific resource (e.g. System, EthernetInterface, etc.)

Quick Start

# Clone and setup
git clone <repository-url>
cd mcp-redfish
make install  # or 'make dev' for development setup

# Option 1: Run with console script (recommended)
uv run mcp-redfish
# OR use Makefile shortcut:
make run-stdio

# Option 2: Run as module (development/CI)
uv run python -m src.main

Installation

Follow these instructions to install the server.

# Clone the repository
git clone <repository-url>
cd mcp-redfish

# Install dependencies using uv
make install

# Or install with development dependencies
make install-dev

Configuration

The Redfish MCP Server uses environment variables for configuration. The server includes comprehensive validation to ensure all settings are properly configured.

Environment Variables

Name

Description

Default Value

Required

REDFISH_HOSTS

JSON array of Redfish endpoint configurations

[{"address":"127.0.0.1"}]

Yes

REDFISH_PORT

Default port for Redfish API (used when not specified per-host)

443

No

REDFISH_AUTH_METHOD

Authentication method: basic or session

session

No

REDFISH_USERNAME

Default username for authentication

""

No

REDFISH_PASSWORD

Default password for authentication

""

No

REDFISH_SERVER_CA_CERT

Path to CA certificate for server verification

None

No

REDFISH_TLS_VERIFY

Verify Redfish server TLS certificates

true

No

REDFISH_DISCOVERY_ENABLED

Enable SSDP discovery of review-only endpoint candidates

false

No

REDFISH_DISCOVERY_INTERVAL

Discovery interval in seconds

30

No

MCP_TRANSPORT

Transport method: stdio, sse, or streamable-http

stdio

No

MCP_HTTP_AUTH

Require MCP client authentication on HTTP transports

true

No

MCP_ALLOW_REMOTE_SSE

Warned break-glass setting for non-loopback SSE

false

No

MCP_AUTH_MODE

none, token, remote_oauth, oauth_proxy, or oidc_proxy

none

HTTP if MCP_HTTP_AUTH=true

MCP_AUTH_TOKEN_LEEWAY_SECONDS

Clock skew for JWT nbf and iat validation

60

No

MCP_AUTH_INTROSPECTION_ISSUER

Required issuer in an active introspection response

unset

Introspection

MCP_AUTH_INTROSPECTION_AUDIENCE

Required MCP resource audience in an introspection response

unset

Introspection

MCP_AUTH_INTROSPECTION_ALLOW_PRIVATE

Explicitly trust a private IdP HTTPS endpoint and internal DNS/routing

false

No

MCP_AUTH_JWKS_ALLOW_PRIVATE

Explicitly trust a private/loopback JWKS URL (lab IdPs such as local Dex)

false

No

FASTMCP_HOST

HTTP bind address. Unset/empty → this project binds 127.0.0.1

(unset → 127.0.0.1)

No

FASTMCP_HTTP_ALLOWED_HOSTS

Exact client-facing hosts; required for off-loopback Streamable HTTP

FastMCP default

Non-loopback Streamable HTTP

MCP_TLS_CERTFILE

PEM server certificate for in-process HTTPS

unset

With key, for HTTP TLS

MCP_TLS_KEYFILE

PEM private key for in-process HTTPS

unset

With cert, for HTTP TLS

MCP_TLS_TERMINATED

Assert TLS is terminated in front of this MCP Server

false

HTTP + auth + non-loopback without certs

MCP_REDFISH_LOG_LEVEL

Logging level: DEBUG, INFO, WARNING, ERROR, CRITICAL

INFO

No

REDFISH_HOSTS Configuration

The REDFISH_HOSTS environment variable accepts a JSON array of endpoint configurations. Each endpoint can have the following properties:

[
  {
    "address": "192.168.1.100",
    "port": 443,
    "username": "admin",
    "password": "password123",
    "auth_method": "session",
    "tls_server_ca_cert": "/path/to/ca-cert.pem",
    "tls_verify": true
  },
  {
    "address": "192.168.1.101",
    "port": 8443,
    "username": "operator",
    "password": "secret456",
    "auth_method": "basic"
  }
]

Per-host properties:

  • address (required): IP address or hostname of the Redfish endpoint

  • port (optional): Port number (defaults to global REDFISH_PORT)

  • username (optional): Username (defaults to global REDFISH_USERNAME)

  • password (optional): Password (defaults to global REDFISH_PASSWORD)

  • auth_method (optional): Authentication method (defaults to global REDFISH_AUTH_METHOD)

  • tls_server_ca_cert (optional): Path to CA certificate (defaults to global REDFISH_SERVER_CA_CERT)

  • tls_verify (optional): Verify the server TLS certificate (defaults to global REDFISH_TLS_VERIFY, which defaults to true)

TLS Certificate Verification

Redfish HTTPS connections verify the server certificate by default. If no custom CA certificate is configured, the server uses its default trusted CA certificate bundle.

For Redfish endpoints that use certificates signed by a private CA, configure the CA bundle globally:

REDFISH_SERVER_CA_CERT=/path/to/ca-bundle.pem

or per host:

[
  {
    "address": "bmc.example.com",
    "tls_server_ca_cert": "/path/to/ca-bundle.pem"
  }
]

When a custom CA file is configured, it is used as the trust bundle for that connection. It replaces the default trusted CA certificate bundle. Ensure the certificate hostname or IP address matches the configured address value.

For lab or troubleshooting environments, TLS certificate verification can be explicitly disabled globally with REDFISH_TLS_VERIFY=false or per host with "tls_verify": false. Disabling verification keeps the HTTPS connection encrypted, but the server identity is not authenticated. Use this only when you explicitly trust the network and endpoint.

Discovery and Trust

SSDP discovery is disabled by default. When enabled, discovered Redfish endpoints are treated as review-only candidates. They are returned by list_discovered_servers with both the SSDP packet source address and the advertised Redfish service-root URI, including parsed host, port, and scheme details.

Discovered candidates are not returned by list_servers and are not used by get_resource_data. To manage a discovered endpoint or send credentials to it, explicitly add the trusted endpoint to REDFISH_HOSTS.

Configuration Methods

There are several ways to set environment variables:

  1. Using a .env file (Recommended):

    Place a .env file in your project directory with key-value pairs for each environment variable. This is secure and convenient, keeping sensitive data out of version control.

    # Copy the example configuration
    cp .env.example .env
    
    # Edit the .env file with your settings
    nano .env

    Example .env contents:

    # Redfish endpoint configuration
    REDFISH_HOSTS='[{"address": "192.168.1.100", "username": "admin", "password": "secret123"}, {"address": "192.168.1.101", "port": 8443}]'
    REDFISH_AUTH_METHOD=session
    REDFISH_USERNAME=default_user
    REDFISH_PASSWORD=default_pass
    REDFISH_TLS_VERIFY=true
    
    # MCP configuration
    MCP_TRANSPORT=stdio
    MCP_REDFISH_LOG_LEVEL=INFO

    HTTP transports require MCP authentication. See the authentication guide for JWT, introspection, Remote OAuth, OAuth Proxy, and OIDC Proxy. See the HTTP deployment guide for bind addresses, Host/Origin protection, TLS, containers, and Kubernetes.

  2. Setting variables in the shell:

    Export environment variables directly in your shell before running the application:

    export REDFISH_HOSTS='[{"address": "127.0.0.1"}]'
    export MCP_TRANSPORT="stdio"
    export MCP_REDFISH_LOG_LEVEL="DEBUG"

Configuration Validation

The server performs comprehensive validation on startup:

  • JSON Syntax: REDFISH_HOSTS must be valid JSON

  • Required Fields: Each host must have an address field

  • Port Ranges: Ports must be between 1 and 65535

  • Authentication Methods: Must be basic or session

  • Transport Types: Must be stdio, sse, or streamable-http

  • Log Levels: Must be DEBUG, INFO, WARNING, ERROR, or CRITICAL

If validation fails, the server reports the specific error as a single Configuration error: … line and exits with a non-zero status — no traceback, and no fallback parser: a configuration the validator rejects never starts the server with substituted defaults. A server that fails to start for any other reason also exits non-zero, so a supervisor restarts it instead of treating it as healthy.

A few FastMCP-native settings that would weaken these controls are refused at startup. See the authentication guide and HTTP deployment guide.

Breaking change: earlier releases logged a deprecation warning and continued with lenient legacy parsing, which could silently replace a malformed REDFISH_HOSTS with 127.0.0.1, force REDFISH_TLS_VERIFY back to enabled, or pass an unrecognised MCP_TRANSPORT straight through to the server. All of those now abort. Fix the reported variable rather than relying on the old defaults.

Running the Server

The MCP Redfish server supports multiple execution methods:

# For end users and production deployments
uv run mcp-redfish

Module Execution

# For development and CI/CD environments
uv run python -m src.main

Makefile Targets

# Development shortcuts
make run-stdio    # Run with stdio transport
make run-sse      # SSE: fails closed unless MCP auth env is set
make run-streamable-http  # Preferred HTTP transport; same auth rule
make inspect      # Run with MCP Inspector

Transports

The transport is how an MCP client connects to this server:

  • stdio starts the server as a local child process.

  • streamable-http accepts network connections and is the preferred remote option.

  • sse is an older HTTP option with fewer browser-security protections.

Breaking change: HTTP MCP transports (sse, streamable-http) now require authentication. Set MCP_AUTH_MODE (and the matching MCP_AUTH_* variables), or set MCP_HTTP_AUTH=false to keep unauthenticated HTTP. stdio is unchanged. See README and the release notes.

The authentication operator guide includes a plain-English setup guide and definitions for terms such as JWT, IdP, JWKS, audience, introspection, and SSRF. The HTTP deployment guide expands bind addresses, Host/Origin protection, TLS, containers, and Kubernetes.

stdio Transport (Default)

The MCP client starts this server and communicates through the process's standard input and output. It does not open an HTTP port. MCP HTTP authentication does not apply.

Do not use another tool to expose this local connection over unauthenticated HTTP.

# Set transport mode
export MCP_TRANSPORT="stdio"

# Console script execution
uv run mcp-redfish

# Module execution (for CI/CD)
uv run python -m src.main

streamable-http Transport (preferred HTTP)

Breaking change: this transport will not start unless MCP_AUTH_MODE is configured or MCP_HTTP_AUTH=false.

export MCP_TRANSPORT=streamable-http
# Production-shaped: JWT (see docs/MCP_AUTH.md)
export MCP_AUTH_MODE=token
export MCP_AUTH_JWT_JWKS_URI=https://idp.example.com/.well-known/jwks.json
export MCP_AUTH_JWT_ISSUER=https://idp.example.com/
export MCP_AUTH_JWT_AUDIENCE=mcp-redfish
make run-streamable-http

Lab only (unauthenticated HTTP):

export MCP_TRANSPORT=streamable-http
export MCP_HTTP_AUTH=false   # logs a warning; any client that can reach this MCP Server can call tools
make run-streamable-http

Clients send Authorization: Bearer <token> when auth is enabled. A request without a token is rejected:

curl -i http://127.0.0.1:8000/mcp
HTTP/1.1 401 Unauthorized
curl -i -H "Authorization: Bearer <jwt>" http://127.0.0.1:8000/mcp

HTTP listener: bind address, TLS, and Host/Origin

These settings are separate from authentication (MCP_AUTH_*). Authentication decides who may call MCP tools. The listener settings decide where the server accepts connections, whether the network path is encrypted, and (for Streamable HTTP) whether the request's Host and Origin headers are trusted.

Concern

Variables

Loopback (FASTMCP_HOST unset → 127.0.0.1)

Off-loopback (FASTMCP_HOST=0.0.0.0, a pod IP, etc.)

Bind address

FASTMCP_HOST, FASTMCP_PORT

Only local clients can connect. Cleartext HTTP is allowed.

The server may be reachable from the network.

TLS on the wire

MCP_TLS_CERTFILE + MCP_TLS_KEYFILE, or MCP_TLS_TERMINATED=true

Not required.

Required when HTTP authentication is enabled. Either terminate TLS in this process (cert + key) or set MCP_TLS_TERMINATED=true only when a reverse proxy or mesh already provides HTTPS in front.

Host/Origin checks

FASTMCP_HTTP_ALLOWED_HOSTS, optionally FASTMCP_HTTP_ALLOWED_ORIGINS

Automatic for Streamable HTTP.

Required for Streamable HTTP: list every exact client-facing hostname. Wildcards (*) are refused.

Notes:

  • Configure JWT, introspection, or OAuth/OIDC in docs/MCP_AUTH.md; none of the listener variables above replace that.

  • sse shares bind-address and TLS rules but has no Host/Origin protection, so non-loopback SSE is refused unless you set the warned MCP_ALLOW_REMOTE_SSE=true break-glass flag.

  • Step-by-step remote deployment: docs/MCP_HTTP_DEPLOYMENT.md.

SSE Transport (Server-Sent Events)

Breaking change: same authentication rule as streamable-http. Same bind-address and TLS requirements as above. Non-loopback SSE is refused by default because it has no Host/Origin protection — prefer streamable-http for remote use.

export MCP_TRANSPORT="sse"
export MCP_AUTH_MODE=token
# ... JWT variables as above ...
# Loopback SSE needs no extra setting. A legacy non-loopback deployment also
# needs the warned break-glass setting MCP_ALLOW_REMOTE_SSE=true.
make run-sse

Test the SSE server with a token:

curl -i -H "Authorization: Bearer <jwt>" http://127.0.0.1:8000/sse

Without a token (auth enabled):

curl -i http://127.0.0.1:8000/sse
HTTP/1.1 401 Unauthorized

Integrate with your favorite tool or client. VS Code / GitHub Copilot HTTP (not a naked URL):

"mcp": {
  "servers": {
    "redfish-mcp": {
      "type": "http",
      "url": "http://127.0.0.1:8000/mcp",
      "headers": {
        "Authorization": "Bearer ${input:mcp-redfish-token}"
      }
    }
  }
}

Lab HTTP without a token is MCP_HTTP_AUTH=false on loopback only. stdio remains the recommended VS Code path.

Integration with Claude Desktop

Manual configuration

You can configure Claude Desktop to use this MCP Server.

  1. Retrieve your uv command full path (e.g. which uv)

  2. Edit the claude_desktop_config.json configuration file

    • on a MacOS, at ~/Library/Application\ Support/Claude/

{
    "mcpServers": {
        "redfish": {
            "command": "<full_path_uv_command>",
            "args": [
                "--directory",
                "<your_mcp_server_directory>",
                "run",
                "mcp-redfish"
            ],
            "env": {
                "REDFISH_HOSTS": "[{\"address\": \"192.168.1.100\", \"username\": \"admin\", \"password\": \"secret123\"}]",
                "REDFISH_AUTH_METHOD": "session",
                "MCP_TRANSPORT": "stdio",
                "MCP_REDFISH_LOG_LEVEL": "INFO"
            }
        }
    }
}

Note: You can also use module execution by changing the args to ["run", "python", "-m", "src.main"] if needed for development or troubleshooting.

Troubleshooting

You can troubleshoot problems by tailing the log file.

tail -f ~/Library/Logs/Claude/mcp-server-redfish.log

Integration with VS Code

To use the Redfish MCP Server with VS Code, you need:

  1. Enable the agent mode tools. Add the following to your settings.json:

{
  "chat.agent.enabled": true
}
  1. Add the Redfish MCP Server configuration to your mcp.json or settings.json:

// Example .vscode/mcp.json
{
  "servers": {
    "redfish": {
      "type": "stdio",
      "command": "<full_path_uv_command>",
      "args": [
        "--directory",
        "<your_mcp_server_directory>",
        "run",
        "mcp-redfish"
      ],
      "env": {
        "REDFISH_HOSTS": "[{\"address\": \"192.168.1.100\", \"username\": \"admin\", \"password\": \"secret123\"}]",
        "REDFISH_AUTH_METHOD": "session",
        "MCP_TRANSPORT": "stdio"
      }
    }
  }
}
// Example settings.json
{
  "mcp": {
    "servers": {
      "redfish": {
        "type": "stdio",
        "command": "<full_path_uv_command>",
        "args": [
          "--directory",
          "<your_mcp_server_directory>",
          "run",
          "mcp-redfish"
        ],
        "env": {
          "REDFISH_HOSTS": "[{\"address\": \"192.168.1.100\", \"username\": \"admin\", \"password\": \"secret123\"}]",
          "REDFISH_AUTH_METHOD": "session",
          "MCP_TRANSPORT": "stdio"
        }
      }
    }
  }
}

Note: For development or troubleshooting, you can use module execution by changing the last arg from "mcp-redfish" to "python", "-m", "src.main".

For more information, see the VS Code documentation.

Integration with mcphost

mcphost is a command-line host application that manages connections between language models and MCP servers. It acts as the host in the MCP client-server architecture, enabling LLM applications to access external tools, maintain consistent context, and execute commands safely.

mcphost supports a wide range of language models:

  • Anthropic Claude: Claude 3.5 Sonnet, Claude 3.5 Haiku, and other Claude models

  • OpenAI: GPT-4, GPT-4 Turbo, GPT-3.5, and compatible models

  • Google Gemini: Gemini 2.0 Flash, Gemini 1.5 Pro, and other Gemini models

  • Ollama: Any Ollama-compatible model with function calling support

  • Custom APIs: Any OpenAI-compatible API endpoint

Example Configuration using locally hosted models

Create a configuration file at ~/.config/mcphost/mcp-redfish.yaml:

mcpServers:
  redfish:
    type: local
    command: ["python3", "-m", "src.main"]
    environment:
      REDFISH_HOSTS: "[{\"address\": \"<host1>\", \"username\": \"<user1>\", \"password\": \"<pass1>\"}, {\"address\": \"<host2>\", \"username\": \"<user2>\", \"password\": \"<pass2>\"}]"
      REDFISH_AUTH_METHOD: "session"
      MCP_TRANSPORT: "stdio"
      MCP_REDFISH_LOG_LEVEL: "INFO"

Replace the placeholder values (<host1>, <user1>, <pass1>, etc.) with actual Redfish endpoint details.

Usage Examples

Local Models with Ollama:

# Using Ollama models
mcphost -m ollama:llama3 --config ~/.config/mcphost/mcp-redfish.yaml
mcphost -m ollama:mistral --config ~/.config/mcphost/mcp-redfish.yaml
mcphost -m ollama:qwen3 --config ~/.config/mcphost/mcp-redfish.yaml

For detailed information and advanced configuration options, visit the mcphost GitHub repository.

Testing

Interactive Testing

You can use the MCP Inspector for visual debugging of this MCP Server.

# Recommended: Makefile shortcut (uses pinned Inspector from e2e/inspector-version.lock)
make inspect

# Using console script
INSPECTOR="$(uv run python -c "from e2e.inspector_version import load_inspector_package_spec; print(load_inspector_package_spec())")"
npx "$INSPECTOR" uv run mcp-redfish

# Using module execution (for development)
npx "$INSPECTOR" uv run python -m src.main

Inspector minor/patch updates are automated weekly; see e2e/inspector-version.toml.

End-to-End Testing

For comprehensive testing, including testing against a real Redfish API, the project includes an e2e testing environment using the DMTF Redfish Interface Emulator:

# Quick start - run all e2e tests
make e2e-test

# Or step by step:
make e2e-emulator-setup    # Set up emulator and certificates
make e2e-emulator-start    # Start Redfish Interface Emulator
make e2e-test-framework    # Run comprehensive tests with Python framework (recommended)
make e2e-emulator-stop     # Stop emulator

Note: The old target names (e.g., make e2e-setup, make e2e-start) are still supported for backward compatibility, but the new emulator-specific names are recommended for clarity.

The e2e tests provide:

  • Redfish Interface Emulator: Simulated Redfish API for testing

  • SSL/TLS Support: Self-signed certificates for HTTPS testing

  • CI/CD Integration: Automated testing on pull requests

  • Local Development: Full testing environment on your machine

For detailed e2e testing documentation, see E2E_TESTING.md.

Container Runtime Support

The project supports both Docker and Podman as container runtimes:

  • Auto-Detection: Automatically detects and uses available container runtime

  • Docker: Uses optimized Dockerfile with BuildKit cache mounts when available

  • Podman: Uses compatible Dockerfile without cache mounts for broader compatibility

  • Manual Override: Force specific runtime with CONTAINER_RUNTIME environment variable

# Auto-detect (default)
make container-build

# Force Docker
CONTAINER_RUNTIME=docker make container-build

# Force Podman
CONTAINER_RUNTIME=podman make container-build
# Or use convenience target
make podman-build

Unit Testing

Run the standard test suite:

make test        # Run tests
make test-cov    # Run with coverage
make check       # Quick lint + test

Example Use Cases

  • AI Assistants: Enable LLMs to fetch infrastructure data via Redfish API.

  • Chatbots & Virtual Agents: Retrieve data, and personalize responses.

Development

Prerequisites

  • Python 3.14 recommended (3.13 is deprecated and will be removed in a future release)

  • uv for package management

Setup

# Clone the repository
git clone <repository-url>
cd mcp-redfish

# Install development environment (includes dependencies + pre-commit hooks)
make dev

# Or install components separately:
make install-dev    # Install development dependencies
make pre-commit-install  # Set up pre-commit hooks

Development Workflow

The project includes a comprehensive Makefile with 42+ targets for development:

# Code quality
make lint          # Run ruff linting
make format        # Format code with ruff
make type-check    # Run MyPy type checking
make test          # Run pytest tests
make security      # Run bandit security scan

# Development servers
make run-stdio     # Run with stdio transport
make run-sse       # SSE (will not start without MCP auth env)
make run-streamable-http  # Preferred HTTP transport (same auth rule)
make inspect       # Run with MCP Inspector

# All-in-one commands
make all-checks    # Run full quality suite (lint, format, type-check, security, pre-commit)
make check         # Quick check: linting and tests only
make pre-commit-run # Run all pre-commit checks

Code Organization

src/
├── main.py              # Entry point and console script
├── common/              # Shared utilities
│   ├── __init__.py     # Package exports
│   ├── config.py       # Configuration management
│   └── hosts.py        # Host discovery and validation
└── tools/              # MCP tool implementations
    ├── __init__.py
    ├── redfish_tools.py # Core Redfish operations
    └── tool_registry.py # Tool registration

Execution Patterns

  • Console Script: uv run mcp-redfish (recommended for users)

  • Module Execution: uv run python -m src.main (for development/CI)

  • Direct Python: python src/main.py (basic execution)

Testing

# Run all tests
make test

# Run with coverage
make test-cov

# Run specific test files (manual uv command needed)
uv run pytest tests/test_config.py -v

# Integration testing with MCP Inspector
make inspect

Pre-commit Hooks

The project uses pre-commit hooks for code quality:

  • ruff: Linting and formatting

  • mypy: Type checking

  • Custom checks: Import sorting, trailing whitespace

Type System

  • Uses modern Python 3.13+ built-in types (dict, list) instead of typing.Dict, typing.List

  • Comprehensive type annotations with MyPy strict mode

  • Return type annotations for all functions

For more details, see the Makefile targets: make help

Available Tools

3 tools
get_resource_dataGet Resource DataA

Given a Redfish resource URL (e.g., 'https:///redfish/v1'), fetches and returns its data as JSON. To construct a valid Redfish resource URL as input, use the following url schema 'https:///redfish/v1/'.

ParametersJSON Schema
NameRequiredDescriptionDefault
urlYesThe Redfish URL to access the resource.

Output Schema

ParametersJSON Schema
NameRequiredDescription

No output parameters

TDQS

A4.2/5.0
Behavior3/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations, the description carries the burden of disclosing behavior. It states the operation is a fetch returning JSON, which implies a read-only GET. However, it does not mention authentication requirements, error conditions, rate limits, or any side effects. The description is adequate but not rich in behavioral detail.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is two sentences with no wasted words. The core purpose is front-loaded, followed by practical construction guidance. Every sentence earns its place.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a single-parameter tool with an output schema, the description is quite complete: it states what the tool does, returns JSON, and explains URL construction. It does not link to the sibling tools for discovering server addresses, but this is not strictly necessary for invoking the tool correctly. The lack of annotation coverage is partially offset by the simple read-only nature of the operation.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters4/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The input schema already fully describes the 'url' parameter (100% coverage), so the baseline is 3. The description adds value by specifying the exact URL format expected, including the placeholder for server address and the actual path structure. This goes beyond the schema's simple 'The Redfish URL to access the resource.'

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description states a clear verb and resource: 'fetches and returns its data as JSON' given a Redfish resource URL. It clearly distinguishes itself from sibling tools like list_servers and list_discovered_servers, which enumerate servers rather than fetch arbitrary resource data by URL.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines4/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description provides clear context on when to use the tool: to retrieve data from a specific Redfish resource URL. It explains how to construct a valid URL with the schema 'https://<server address>/redfish/v1/<resource path>'. It does not explicitly mention alternatives or when-not-to-use, but the usage context is clear enough for an agent to select it appropriately.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

list_discovered_serversList Discovered ServersA

List discovered Redfish server candidates for review.

Returns: list: A list of discovered Redfish server candidates. These candidates are informational only and are not managed unless explicitly configured.

ParametersJSON Schema
NameRequiredDescriptionDefault

No parameters

TDQS

A4.3/5.0
Behavior4/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations, the description carries the full behavioral burden. It explicitly discloses that the returned candidates are informational only and not managed, implying a read-only, non-mutating operation. It does not mention authentication or rate limits, but for a zero-parameter listing tool this is adequate, and it adds the key non-management context.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is short and front-loaded with the main action. The Returns block adds useful behavioral context about candidates being informational and unmanaged. There is minor redundancy in repeating 'discovered Redfish server candidates,' but no filler or unnecessary detail.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a zero-parameter list operation, the description adequately covers what the tool returns, the status of those items, and the fact that they are for review. It does not specify item fields, but no output schema exists and the return type 'list' is stated. An explicit pointer to list_servers for managed servers would improve completeness, but the 'not managed' phrasing largely covers the distinction.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters4/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The tool has zero parameters, so the baseline of 4 applies. There are no parameter semantics to clarify, and the description appropriately focuses on the return value and purpose.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description states a specific verb and resource: 'List discovered Redfish server candidates for review.' The word 'discovered' distinguishes it from the sibling 'list_servers', and the caveat that candidates are 'not managed unless explicitly configured' further clarifies its unique role.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines4/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description gives clear context: this tool is for reviewing unmanaged discovered candidates, not for managing servers. The phrase 'informational only and are not managed unless explicitly configured' implies when to use this over list_servers. However, it does not explicitly name sibling alternatives or provide a direct when-not-to-use statement.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

list_serversList ServersB

List configured Redfish servers that can be managed.

Returns: list: A list of configured Redfish servers that can be managed

ParametersJSON Schema
NameRequiredDescriptionDefault

No parameters

TDQS

B3.4/5.0
Behavior3/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations, the description carries the behavioral burden. 'List' and 'Returns: list' imply a read-only operation, and the wording indicates what is returned, but the description does not disclose authentication needs, pagination behavior, or explicit side-effect guarantees.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness3/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The first sentence is concise and front-loaded. However, the 'Returns:' line redundantly restates the same information rather than adding new value, which keeps this from being a well-structured high-quality description.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness3/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a zero-parameter tool, the description provides the core information: the result is a list of configured Redfish servers. It does not describe the shape of the returned list items or clarify its relationship to list_discovered_servers, leaving some ambiguity for downstream use.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters4/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The tool has zero parameters and the schema fully expresses that, so there are no parameter semantics for the description to clarify. The 0-parameter baseline of 4 applies.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly identifies the operation as listing configured Redfish servers and adds the scope qualifiers 'configured' and 'can be managed'. It does not explicitly compare itself with list_discovered_servers, but the qualifier gives enough distinction to be useful.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines3/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The phrasing implies this tool is for already-configured, manageable servers rather than discovered or unconfigured ones. However, it does not explicitly say when to choose this tool over list_discovered_servers, leaving the usage guidance mostly implied.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

Tool Schema Changelog

Recent tool additions, removals, and schema changes observed during successful MCP inspections.

  1. 2 tool updatesv0.5.0
    • Changedlist_discovered_servers1 field changed
      • changedOutput schema / (root)
        Previous value: -{
        -  "properties": {
        -    "result": {
        -      "items": {},
        -      "type": "array"
        -    }
        -  },
        -  "required": [
        -    "result"
        -  ],
        -  "type": "object",
        -  "x-fastmcp-wrap-result": true
        -}New value: +null
    • Changedlist_servers1 field changed
      • changedOutput schema / (root)
        Previous value: -{
        -  "properties": {
        -    "result": {
        -      "items": {},
        -      "type": "array"
        -    }
        -  },
        -  "required": [
        -    "result"
        -  ],
        -  "type": "object",
        -  "x-fastmcp-wrap-result": true
        -}New value: +null
  2. 1 tool updatev0.4.2
    • Addedlist_discovered_servers
  3. 2 tool updatesv0.1.0
    • First observedget_resource_data
    • First observedlist_servers

TDQS

A3.8/5.0

Scored across 3 tools

Disambiguation4/5

get_resource_data is clearly distinct from the list tools. list_servers and list_discovered_servers have overlapping purposes, but their descriptions clearly distinguish configured managed servers from unmanaged discovered candidates.

Naming Consistency5/5

All tool names follow a consistent verb_noun snake_case pattern: get_resource_data, list_servers, list_discovered_servers. The naming is predictable and easy to navigate.

Tool Count4/5

Three tools is minimal but reasonable for a server focused on Redfish resource inspection and server inventory. It avoids bloat, though the surface could be expanded with more management operations.

Completeness2/5

The tool set is effectively read-only, covering resource fetching and server listing, but lacks obvious Redfish management operations like configuring servers, powering systems, or performing updates. The generic get_resource_data helps but does not fill the action-level gaps.

Maintenance

ActivityActive
ResponsivenessUnresponsive

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