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knight0zh

MSSQL MCP Server

by knight0zh

Servidor MSSQL MCP

insignia de herrería

Un servidor de Protocolo de Contexto de Modelo (MCP) para conectarse a bases de datos de Microsoft SQL Server. Este servidor proporciona herramientas para ejecutar consultas SQL y administrar conexiones a bases de datos.

Instalación

Instalación mediante herrería

Para instalar MSSQL Database Connector para Claude Desktop automáticamente a través de Smithery :

npx -y @smithery/cli install @knight0zh/mssql-mcp-server --client claude

Instalación manual

npm install mssql-mcp-server

Related MCP server: SQL MCP Server

Uso

Agregue el servidor a su archivo de configuración de MCP:

{
  "mcpServers": {
    "mssql": {
      "command": "mssql-mcp-server",
      "env": {
        "MSSQL_CONNECTION_STRING": "Server=localhost;Database=master;User Id=sa;Password=yourpassword;",
        // Or individual connection parameters:
        "MSSQL_HOST": "localhost",
        "MSSQL_PORT": "1433",
        "MSSQL_DATABASE": "master",
        "MSSQL_USER": "sa",
        "MSSQL_PASSWORD": "yourpassword",
        "MSSQL_ENCRYPT": "false",
        "MSSQL_TRUST_SERVER_CERTIFICATE": "true"
      }
    }
  }
}

Herramientas

consulta

Ejecutar una consulta SQL en una base de datos MSSQL.

Parámetros

  • connectionString (cadena, opcional): cadena de conexión completa (alternativa a parámetros individuales)

  • host (cadena, opcional): nombre de host del servidor de base de datos

  • port (número, opcional): puerto del servidor de base de datos (predeterminado: 1433)

  • database (cadena, opcional): nombre de la base de datos (predeterminado: master)

  • username (cadena, opcional): nombre de usuario de la base de datos

  • password (cadena, opcional): contraseña de la base de datos

  • query (cadena, obligatoria): consulta SQL a ejecutar

  • encrypt (booleano, opcional): habilitar el cifrado (predeterminado: falso)

  • trustServerCertificate (booleano, opcional): Certificado de servidor de confianza (valor predeterminado: verdadero)

Se debe proporcionar connectionString O ( host + username + password ).

Ejemplo

const result = await use_mcp_tool({
  server_name: 'mssql',
  tool_name: 'query',
  arguments: {
    host: 'localhost',
    username: 'sa',
    password: 'yourpassword',
    query: 'SELECT * FROM Users',
  },
});

Desarrollo

# Install dependencies
npm install

# Run in development mode
npm run dev

# Build
npm run build

# Run tests
npm test

# Run linter
npm run lint

# Format code
npm run format

Licencia

Instituto Tecnológico de Massachusetts (MIT)

Available Tools

1 tool
queryC

Execute a SQL query on a MSSQL database

ParametersJSON Schema
NameRequiredDescriptionDefault
connectionStringNoFull connection string (alternative to individual parameters)
hostNoDatabase server hostname
portNoDatabase server port (default: 1433)
databaseNoDatabase name (default: master)
usernameNoDatabase username
passwordNoDatabase password
queryYesSQL query to execute
encryptNoEnable encryption (default: false)
trustServerCertificateNoTrust server certificate (default: true)

TDQS

C2.9/5.0
Behavior2/5

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

With no annotations provided, the description carries full burden for behavioral disclosure. While 'Execute a SQL query' implies both read and write operations, it doesn't specify permissions needed, potential side effects, rate limits, or what happens with complex queries. For a database tool with zero annotation coverage, this leaves significant behavioral gaps.

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 a single, efficient sentence that directly states the tool's purpose without any unnecessary words. It's appropriately sized and front-loaded with the essential information.

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

Completeness2/5

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

For a database query tool with 9 parameters, no annotations, and no output schema, the description is insufficient. It doesn't explain what types of queries are supported, what the return format looks like, error handling, or security considerations. The tool has significant complexity that isn't addressed.

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

Parameters3/5

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

Schema description coverage is 100%, meaning all parameters are documented in the schema itself. The description doesn't add any parameter-specific information beyond what's already in the schema, so it meets the baseline for high schema coverage but doesn't provide additional value.

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 states the action ('Execute a SQL query') and target resource ('on a MSSQL database'), providing specific verb+resource information. However, with no sibling tools mentioned, there's no opportunity to distinguish from alternatives, preventing a perfect score.

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

Usage Guidelines2/5

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

The description provides no guidance on when to use this tool versus alternatives, prerequisites, or context for usage. It simply states what the tool does without any usage instructions or constraints.

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. 1 tool update
    • First observedquery

TDQS

B3.1/5.0

Scored across 1 tool

Disambiguation5/5

With only one tool, there is no possibility of ambiguity or overlap between tools, as there are no other tools to compare it to. The tool's purpose is clearly defined and distinct by default.

Naming Consistency5/5

Since there is only one tool, it inherently has perfect naming consistency with itself. The tool name 'query' follows a simple verb pattern, and there are no other tools to create inconsistency.

Tool Count2/5

A single tool for an MSSQL server is too few for the apparent scope, as it lacks basic operations like listing tables, describing schemas, or executing parameterized queries. This minimal set will likely cause agent failures due to incomplete functionality.

Completeness2/5

The tool surface is severely incomplete for an MSSQL database server. While the 'query' tool allows executing SQL, there are significant gaps such as no tools for metadata exploration, transaction management, or data manipulation beyond raw queries, which are essential for typical database workflows.

Maintenance

ActivityInactive
ResponsivenessNo issues

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