@aditya-vaish/kusto-mcp-server/dist/tools/execute-query.js

MCP server for interacting with Kusto databases

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.executeQueryTool = void 0;
const zod_1 = require("zod");
const kustoService_1 = require("../services/kustoService");
// Tool to execute KQL queries
exports.executeQueryTool = {
    name: "execute_query",
    description: `This tool executes a Kusto query against the database and returns the results.
  The query must be a valid KQL query without administrative commands.
  The result is a JSON object containing the query results.
  Inputs: clusterUrl, database, query, maxRows (optional, default is 100).
  Note: When querying external tables make sure to use apppropriate syntax (e.g. 'external_table(<table_name>)').
  Note: The query *must* not contain any administrative commands or control commands.
  Note: For listing tables, use the 'list_tables' tool.
  Note: For getting table schema, use the 'get_table_schema' tool.`,
    parameters: {
        clusterUrl: zod_1.z.string().describe("The Kusto cluster URL (e.g., https://yourcluster.kusto.windows.net)"),
        database: zod_1.z.string().describe("The name of the database in the Kusto cluster"),
        query: zod_1.z.string().min(1).max(10000).describe("The KQL query to execute"),
        maxRows: zod_1.z.number().int().min(1).max(10000).optional().default(100).describe("Maximum number of rows to return (default: 100)")
    },
    handler: async ({ clusterUrl, database, query, maxRows = 100 }) => {
        // Check for forbidden administrative commands
        const controlCommandPatterns = [
            /alter\s+table/i,
            /create\s+table/i,
            /drop\s+table/i,
            /set\s+/i,
            /function/i,
            /policy/i,
            /purge/i,
            /ingestion/i,
            /database/i,
            /cluster/i,
            /management/i,
            /\|\s*render/i,
            /let\s+\w+\s*=/i
        ];
        for (const pattern of controlCommandPatterns) {
            if (pattern.test(query)) {
                return {
                    content: [
                        {
                            type: "text",
                            text: `Error: The query contains forbidden administrative commands or syntax.
                Please use only Kusto query language (KQL) operations.
                Note: For listing tables, use the \`list_tables\` tool.
                Note: For getting table schema, use the \`get_table_schema\` tool.`
                        }
                    ]
                };
            }
        }
        try {
            const safeQuery = `${query} | take ${maxRows}`;
            const result = await kustoService_1.KustoService.executeQuery(clusterUrl, database, safeQuery);
            return {
                content: [
                    {
                        type: "text",
                        text: `Query results: ${JSON.stringify(result, null, 2)}`
                    }
                ]
            };
        }
        catch (error) {
            return {
                content: [
                    {
                        type: "text",
                        text: `Error executing query: ${error.message}`
                    }
                ]
            };
        }
    }
};
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