WP Navigator MCP

import { tools } from './tools.js'; type JSONSchema = any; const schemaByTool: Record<string, JSONSchema | undefined> = Object.create(null); for (const t of tools as Array<any>) { if (t?.name) schemaByTool[t.name] = t.inputSchema; } /** * Lightweight JSON-schema-like validator for tool args. * - Enforces required fields * - Applies defaults * - Removes additional properties * - Performs basic type checks for string/number/boolean * * This is a stop-gap until Ajv is wired (no runtime dependency required). */ export function validateArgsForTool(toolName: string, args: any): any { const schema = schemaByTool[toolName]; if (!schema || schema.type !== 'object' || !schema.properties) return args ?? {}; const input = (args && typeof args === 'object') ? { ...args } : {}; const out: Record<string, any> = {}; const props: Record<string, any> = schema.properties || {}; // Apply defaults and coerce known props for (const key of Object.keys(props)) { const def = props[key]; let value = input.hasOwnProperty(key) ? input[key] : undefined; if (value === undefined && def && def.default !== undefined) { value = def.default; } if (value !== undefined) { const ok = basicTypeCheck(def?.type, value, def?.enum); if (ok) out[key] = value; } } // Validate required const required: string[] = Array.isArray(schema.required) ? schema.required : []; const missing = required.filter((k) => out[k] === undefined); if (missing.length) { throw new Error(`Invalid arguments for ${toolName}: missing required ${missing.join(', ')}`); } return out; } function basicTypeCheck(type: string | undefined, val: any, enumVals?: any[]): boolean { if (enumVals && Array.isArray(enumVals)) { if (!enumVals.includes(val)) return false; } switch (type) { case 'string': return typeof val === 'string'; case 'number': return typeof val === 'number' && Number.isFinite(val); case 'integer': return typeof val === 'number' && Number.isInteger(val); case 'boolean': return typeof val === 'boolean'; case 'object': return val && typeof val === 'object' && !Array.isArray(val); case 'array': return Array.isArray(val); default: return true; // if unspecified, accept } }