Implement missing MCP protocol methods

[crivetimihai]

Summary

The main JSON-RPC handler in mcpgateway/main.py has several MCP protocol methods that are currently stubbed out with empty {} responses. These need proper implementations to achieve full MCP protocol compliance.

Missing Methods

The following methods are marked with TODO: Implement methods at line 2305:

Resource Templates

• resources/templates/list - Should list available resource templates

Roots Management

• roots/* methods - Root-related operations (e.g., roots/list_changed)

Notifications

• notifications/* methods - Progress notifications, cancellation, etc.

Sampling

• sampling/* methods - Model sampling and interaction controls

Elicitation

• elicitation/* methods - Methods for eliciting information from models

Completion

• completion/* methods - Text/code completion functionality

Logging Control

• logging/* methods - Dynamic logging level control and configuration

Current Status

These methods currently return empty objects {} which means:

• Clients receive valid responses but no actual functionality
• The gateway is not fully MCP protocol compliant
• Some advanced MCP features are unavailable

Implementation Requirements

1. Define proper schemas in mcpgateway/schemas.py for request/response models
2. Create service methods in appropriate service classes
3. Implement handlers in the main JSON-RPC router
4. Add tests for each new method
5. Update documentation with the new capabilities

File Locations

• Main handler: mcpgateway/main.py:2305-2319
• Related services: mcpgateway/services/
• Schemas: mcpgateway/schemas.py

Acceptance Criteria

• All stubbed methods have proper implementations
• Unit tests cover new functionality
• Integration tests verify MCP protocol compliance
• Documentation updated
• No breaking changes to existing API