diff --git a/README.md b/README.md index b91c1fbc..e5915ed2 100644 --- a/README.md +++ b/README.md @@ -300,8 +300,8 @@ NOTE: atlas tools are only available when you set credentials on [configuration] #### MongoDB Database Tools - `connect` - Connect to a MongoDB instance -- `find` - Run a find query against a MongoDB collection -- `aggregate` - Run an aggregation against a MongoDB collection +- `find` - Run a find query against a MongoDB collection. The number of documents returned is limited by the `limit` parameter and the server's `maxDocumentsPerQuery` configuration, whichever is smaller. The total size of the returned documents is also limited by the `responseBytesLimit` parameter and the server's `maxBytesPerQuery` configuration, whichever is smaller. +- `aggregate` - Run an aggregation against a MongoDB collection. The number of documents returned is limited by the server's `maxDocumentsPerQuery` configuration. The total size of the returned documents is also limited by the `responseBytesLimit` parameter and the server's `maxBytesPerQuery` configuration, whichever is smaller. - `count` - Get the number of documents in a MongoDB collection - `insert-one` - Insert a single document into a MongoDB collection - `insert-many` - Insert multiple documents into a MongoDB collection @@ -338,27 +338,29 @@ The MongoDB MCP Server can be configured using multiple methods, with the follow ### Configuration Options -| CLI Option | Environment Variable | Default | Description | -| -------------------------------------- | --------------------------------------------------- | --------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | -| `apiClientId` | `MDB_MCP_API_CLIENT_ID` | | Atlas API client ID for authentication. Required for running Atlas tools. | -| `apiClientSecret` | `MDB_MCP_API_CLIENT_SECRET` | | Atlas API client secret for authentication. Required for running Atlas tools. | -| `connectionString` | `MDB_MCP_CONNECTION_STRING` | | MongoDB connection string for direct database connections. Optional, if not set, you'll need to call the `connect` tool before interacting with MongoDB data. | -| `loggers` | `MDB_MCP_LOGGERS` | disk,mcp | Comma separated values, possible values are `mcp`, `disk` and `stderr`. See [Logger Options](#logger-options) for details. | -| `logPath` | `MDB_MCP_LOG_PATH` | see note\* | Folder to store logs. | -| `disabledTools` | `MDB_MCP_DISABLED_TOOLS` | | An array of tool names, operation types, and/or categories of tools that will be disabled. | -| `confirmationRequiredTools` | `MDB_MCP_CONFIRMATION_REQUIRED_TOOLS` | create-access-list,create-db-user,drop-database,drop-collection,delete-many | An array of tool names that require user confirmation before execution. **Requires the client to support [elicitation](https://modelcontextprotocol.io/specification/draft/client/elicitation)**. | -| `readOnly` | `MDB_MCP_READ_ONLY` | false | When set to true, only allows read, connect, and metadata operation types, disabling create/update/delete operations. | -| `indexCheck` | `MDB_MCP_INDEX_CHECK` | false | When set to true, enforces that query operations must use an index, rejecting queries that perform a collection scan. | -| `telemetry` | `MDB_MCP_TELEMETRY` | enabled | When set to disabled, disables telemetry collection. | -| `transport` | `MDB_MCP_TRANSPORT` | stdio | Either 'stdio' or 'http'. | -| `httpPort` | `MDB_MCP_HTTP_PORT` | 3000 | Port number. | -| `httpHost` | `MDB_MCP_HTTP_HOST` | 127.0.0.1 | Host to bind the http server. | -| `idleTimeoutMs` | `MDB_MCP_IDLE_TIMEOUT_MS` | 600000 | Idle timeout for a client to disconnect (only applies to http transport). | -| `notificationTimeoutMs` | `MDB_MCP_NOTIFICATION_TIMEOUT_MS` | 540000 | Notification timeout for a client to be aware of diconnect (only applies to http transport). | -| `exportsPath` | `MDB_MCP_EXPORTS_PATH` | see note\* | Folder to store exported data files. | -| `exportTimeoutMs` | `MDB_MCP_EXPORT_TIMEOUT_MS` | 300000 | Time in milliseconds after which an export is considered expired and eligible for cleanup. | -| `exportCleanupIntervalMs` | `MDB_MCP_EXPORT_CLEANUP_INTERVAL_MS` | 120000 | Time in milliseconds between export cleanup cycles that remove expired export files. | -| `atlasTemporaryDatabaseUserLifetimeMs` | `MDB_MCP_ATLAS_TEMPORARY_DATABASE_USER_LIFETIME_MS` | 14400000 | Time in milliseconds that temporary database users created when connecting to MongoDB Atlas clusters will remain active before being automatically deleted. | +| CLI Option | Environment Variable | Default | Description | +| -------------------------------------- | --------------------------------------------------- | --------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | +| `apiClientId` | `MDB_MCP_API_CLIENT_ID` | | Atlas API client ID for authentication. Required for running Atlas tools. | +| `apiClientSecret` | `MDB_MCP_API_CLIENT_SECRET` | | Atlas API client secret for authentication. Required for running Atlas tools. | +| `connectionString` | `MDB_MCP_CONNECTION_STRING` | | MongoDB connection string for direct database connections. Optional, if not set, you'll need to call the `connect` tool before interacting with MongoDB data. | +| `loggers` | `MDB_MCP_LOGGERS` | disk,mcp | Comma separated values, possible values are `mcp`, `disk` and `stderr`. See [Logger Options](#logger-options) for details. | +| `logPath` | `MDB_MCP_LOG_PATH` | see note\* | Folder to store logs. | +| `disabledTools` | `MDB_MCP_DISABLED_TOOLS` | | An array of tool names, operation types, and/or categories of tools that will be disabled. | +| `confirmationRequiredTools` | `MDB_MCP_CONFIRMATION_REQUIRED_TOOLS` | create-access-list,create-db-user,drop-database,drop-collection,delete-many | An array of tool names that require user confirmation before execution. **Requires the client to support [elicitation](https://modelcontextprotocol.io/specification/draft/client/elicitation)**. | +| `readOnly` | `MDB_MCP_READ_ONLY` | false | When set to true, only allows read, connect, and metadata operation types, disabling create/update/delete operations. | +| `indexCheck` | `MDB_MCP_INDEX_CHECK` | false | When set to true, enforces that query operations must use an index, rejecting queries that perform a collection scan. | +| `telemetry` | `MDB_MCP_TELEMETRY` | enabled | When set to disabled, disables telemetry collection. | +| `transport` | `MDB_MCP_TRANSPORT` | stdio | Either 'stdio' or 'http'. | +| `httpPort` | `MDB_MCP_HTTP_PORT` | 3000 | Port number. | +| `httpHost` | `MDB_MCP_HTTP_HOST` | 127.0.0.1 | Host to bind the http server. | +| `idleTimeoutMs` | `MDB_MCP_IDLE_TIMEOUT_MS` | 600000 | Idle timeout for a client to disconnect (only applies to http transport). | +| `maxBytesPerQuery` | `MDB_MCP_MAX_BYTES_PER_QUERY` | 16777216 (16MiB) | The maximum size in bytes for results from a `find` or `aggregate` tool call. This serves as an upper bound for the `responseBytesLimit` parameter in those tools. | +| `maxDocumentsPerQuery` | `MDB_MCP_MAX_DOCUMENTS_PER_QUERY` | 100 | The maximum number of documents that can be returned by a `find` or `aggregate` tool call. For the `find` tool, the effective limit will be the smaller of this value and the tool's `limit` parameter. | +| `notificationTimeoutMs` | `MDB_MCP_NOTIFICATION_TIMEOUT_MS` | 540000 | Notification timeout for a client to be aware of diconnect (only applies to http transport). | +| `exportsPath` | `MDB_MCP_EXPORTS_PATH` | see note\* | Folder to store exported data files. | +| `exportTimeoutMs` | `MDB_MCP_EXPORT_TIMEOUT_MS` | 300000 | Time in milliseconds after which an export is considered expired and eligible for cleanup. | +| `exportCleanupIntervalMs` | `MDB_MCP_EXPORT_CLEANUP_INTERVAL_MS` | 120000 | Time in milliseconds between export cleanup cycles that remove expired export files. | +| `atlasTemporaryDatabaseUserLifetimeMs` | `MDB_MCP_ATLAS_TEMPORARY_DATABASE_USER_LIFETIME_MS` | 14400000 | Time in milliseconds that temporary database users created when connecting to MongoDB Atlas clusters will remain active before being automatically deleted. | #### Logger Options