@inso_web/els-mcp/dist/tools/errorHistogram.js

MCP-сервер поверх INSO Error Logs Service. Read-only tools (search, analytics, fingerprinting, correlations) для подключения Claude Desktop/Code и ChatGPT к логам ошибок. Streamable HTTP transport + stdio для npx-запуска.

import { z } from 'zod';
import { ToolError } from '../lib/errors.js';
/**
 * Tool: error_histogram
 * Mapping: GET /analytics/histogram → analytics.routes.ts:241
 * Upstream Zod: HistogramSchema (from + to required, + фасет-фильтры).
 *
 * Bucket size auto-selected by range (5m / 30m / 1h / 1d).
 */
export const errorHistogramInputShape = {
    from: z.string().min(1).describe('ISO timestamp lower bound (required).'),
    to: z.string().min(1).describe('ISO timestamp upper bound (required).'),
    level: z.array(z.string().max(16)).optional(),
    serviceName: z.array(z.string().max(255)).optional(),
    appVersion: z.array(z.string().max(64)).optional(),
};
export const errorHistogramToolDef = {
    name: 'error_histogram',
    title: 'Error count histogram over time',
    description: [
        'Time-series histogram of error counts. Bucket size auto-selected by range.',
        '',
        'WHEN TO USE:',
        '  - Before/after deploy comparison - did error rate spike after release?',
        '  - Pre-merge baseline - capture current error trend to compare after merge.',
        '  - Hot-fix verification - confirm the rate dropped after the fix shipped.',
        '  - User asks "how did errors trend today?".',
    ].join('\n'),
    inputShape: errorHistogramInputShape,
};
export async function handleErrorHistogram(args, client) {
    try {
        const params = {
            from: args.from,
            to: args.to,
            levels: args.level?.join(','),
            serviceName: args.serviceName?.join(','),
            appVersion: args.appVersion?.join(','),
        };
        const { data, elsRequestId } = await client.errorHistogram(params);
        const meta = {
            elsRequestId,
            cached: false,
            ttlSec: 30,
            redactionApplied: false,
        };
        return {
            structuredContent: {
                interval: data.interval,
                from: data.from,
                to: data.to,
                data: data.data,
                _meta: meta,
            },
            content: [
                {
                    type: 'text',
                    text: `Histogram with ${data.data?.length ?? 0} buckets (interval=${data.interval}, from=${data.from}, to=${data.to}).`,
                },
            ],
        };
    }
    catch (err) {
        if (err instanceof ToolError)
            return err.toToolResult();
        throw err;
    }
}
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