#!/usr/bin/env node
/**
* Measure token usage of MCP tool schemas
*/
const fs = require('fs');
const path = require('path');
// Simple token estimation: ~4 characters per token
function estimateTokens(text) {
return Math.ceil(text.length / 4);
}
// Load all tool files
const toolsDir = path.join(__dirname, '../src/tools');
function getAllTools() {
const tools = [];
function scanDir(dir) {
const entries = fs.readdirSync(dir, { withFileTypes: true });
for (const entry of entries) {
const fullPath = path.join(dir, entry.name);
if (entry.isDirectory()) {
scanDir(fullPath);
} else if (entry.name.endsWith('.ts') && !entry.name.endsWith('.test.ts')) {
const content = fs.readFileSync(fullPath, 'utf8');
// Extract tool class names
const classMatches = content.matchAll(/export class (\w+Tool) extends BaseTool/g);
for (const match of classMatches) {
const className = match[1];
// Find inputSchema
const schemaMatch = content.match(/public inputSchema = \{[\s\S]*?\n \};/);
if (schemaMatch) {
const schemaText = schemaMatch[0];
const tokens = estimateTokens(schemaText);
tools.push({
name: className,
file: path.relative(toolsDir, fullPath),
tokens,
size: schemaText.length
});
}
}
}
}
}
scanDir(toolsDir);
return tools;
}
// Main execution
console.log('=== MCP Gas Tools Token Measurement ===\n');
const tools = getAllTools();
// Sort by tokens descending
tools.sort((a, b) => b.tokens - a.tokens);
console.log('Top 15 Largest Tool Schemas:\n');
for (let i = 0; i < Math.min(15, tools.length); i++) {
const tool = tools[i];
console.log(` ${(i+1).toString().padStart(2)}. ${tool.name.padEnd(35)} ${tool.tokens.toString().padStart(6)} tokens (${tool.size.toLocaleString()} chars)`);
}
const totalTokens = tools.reduce((sum, tool) => sum + tool.tokens, 0);
const totalChars = tools.reduce((sum, tool) => sum + tool.size, 0);
console.log(`\n${'='.repeat(70)}`);
console.log(`Total Tools: ${tools.length}`);
console.log(`Total Estimated Tokens: ${totalTokens.toLocaleString()}`);
console.log(`Total Characters: ${totalChars.toLocaleString()}`);
console.log(`Average per Tool: ${Math.round(totalTokens / tools.length)} tokens`);
console.log(`\nContext Budget: 200,000 tokens`);
console.log(`Tool Schemas Usage: ${totalTokens.toLocaleString()} tokens (${((totalTokens / 200000) * 100).toFixed(1)}%)`);
console.log(`Remaining Budget: ${(200000 - totalTokens).toLocaleString()} tokens`);
