count_documents

Count documents in a MongoDB collection using a specified filter. Efficiently determine data volume, optimize query strategies, and implement pagination without retrieving full documents.

Instructions

Count documents in a collection that match a filter.

Benefits:

More efficient than retrieving full documents
Good for understanding data volume
Can help planning query strategies
Optimize pagination implementation

Example: use_mcp_tool with server_name: "mongodb", tool_name: "count_documents", arguments: { "collection": "users", "filter": { "active": true, "age": { "$gte": 21 } } }

Input Schema

Name	Required	Description
`collection`	Yes	Collection name
`database`	No	Database name (optional if default database is configured)
`filter`	No	MongoDB query filter (optional, defaults to count all documents)

Input Schema (JSON Schema)

{
  "properties": {
    "collection": {
      "description": "Collection name",
      "type": "string"
    },
    "database": {
      "description": "Database name (optional if default database is configured)",
      "type": "string"
    },
    "filter": {
      "description": "MongoDB query filter (optional, defaults to count all documents)",
      "type": "object"
    }
  },
  "required": [
    "collection"
  ],
  "type": "object"
}

MongoDB MCP Server

count_documents

Instructions

Input Schema

Input Schema (JSON Schema)

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MCP directory API