// Schema inspector for MCP SDK
import {
CallToolRequestSchema,
ListResourcesRequestSchema,
ListToolsRequestSchema,
ReadResourceRequestSchema,
} from '@modelcontextprotocol/sdk/types.js';
// Function to inspect schema objects
function inspectSchema(name, schema) {
console.log(`\n=== Inspecting ${name} ===`);
// Try to extract method name or other identifying information
console.log('Schema object keys:', Object.keys(schema));
// Check for common properties that might contain method name
if (schema.method) console.log('Method property:', schema.method);
if (schema._def) console.log('_def property keys:', Object.keys(schema._def));
if (schema._def?.method) console.log('_def.method:', schema._def.method);
// Check for any string properties that might be method names
for (const key of Object.keys(schema)) {
if (typeof schema[key] === 'string') {
console.log(`${key}:`, schema[key]);
}
}
// Try to stringify the schema (might be too large/circular)
try {
console.log('Schema JSON:', JSON.stringify(schema, null, 2));
} catch (err) {
console.log('Cannot stringify schema:', err.message);
// Try to extract specific properties
if (schema._def) {
try {
console.log('_def JSON:', JSON.stringify(schema._def, null, 2));
} catch (innerErr) {
console.log('Cannot stringify _def:', innerErr.message);
}
}
}
}
// Inspect all schemas
console.log('Inspecting MCP SDK schemas to find method names...');
inspectSchema('ListToolsRequestSchema', ListToolsRequestSchema);
inspectSchema('CallToolRequestSchema', CallToolRequestSchema);
inspectSchema('ListResourcesRequestSchema', ListResourcesRequestSchema);
inspectSchema('ReadResourceRequestSchema', ReadResourceRequestSchema);
// Try to access internal properties that might contain method names
console.log('\n=== Attempting to access internal properties ===');
// Try to access typeName if it exists
const schemas = [
{ name: 'ListToolsRequestSchema', schema: ListToolsRequestSchema },
{ name: 'CallToolRequestSchema', schema: CallToolRequestSchema },
{ name: 'ListResourcesRequestSchema', schema: ListResourcesRequestSchema },
{ name: 'ReadResourceRequestSchema', schema: ReadResourceRequestSchema }
];
for (const { name, schema } of schemas) {
console.log(`\nExamining ${name}:`);
// Try different property paths that might contain the method name
const paths = [
'_def.typeName',
'_def.method',
'_def.name',
'_def.path',
'typeName',
'method',
'name',
'path'
];
for (const path of paths) {
try {
const parts = path.split('.');
let value = schema;
for (const part of parts) {
value = value[part];
}
if (value) {
console.log(`${path} =`, value);
}
} catch (err) {
// Silently ignore errors
}
}
}
console.log('\nInspection complete.');
