# Granular Approval System Test Coverage Summary
This document summarizes the test coverage for the granular approval system implemented in the MCP wrapper.
## ✅ **Covered Scenarios**
### 1. **New Server Blocking** (Requirement: New server → totally blocked)
**Files:** `test_config_approval_security.py`, `test_mcp_wrapper.py`, existing tests
- ✅ New servers are completely blocked until approved
- ✅ Only `config_instructions` tool is available for new servers
- ✅ All downstream tools and prompts are blocked
- ✅ Zero information leakage from unapproved servers
### 2. **Tool Addition** (Requirement: New tool → only that tool is blocked)
**Files:** `test_granular_tool_approval.py`
- ✅ `test_granular_approval_database_logic()` - Tests that adding a new tool to an approved server:
- Instructions remain approved (unchanged)
- Original tools remain approved
- New tool is not approved
- Database correctly tracks granular approval status
### 3. **Tool Modification** (Requirement: Changed tool → only that tool is blocked)
**Files:** `test_granular_tool_approval.py`
- ✅ `test_tool_modification_granular_blocking()` - Tests tool description changes
- ✅ `test_tool_parameter_modification_blocking()` - Tests parameter changes
- Tests verify that:
- Modified tools lose approval status
- Unchanged tools retain approval status
- Cryptographic hashing detects all tool changes
### 4. **Tool Removal** (Requirement: Removed tool → disappears with no reapproval)
**Files:** `test_granular_tool_approval.py`
- ✅ `test_tool_removal_no_reapproval_needed()` - Tests that:
- Removed tools simply disappear from approval tracking
- Remaining tools stay approved without reapproval
- No security approval process needed for removal
### 5. **Server Instructions Change** (Requirement: Instructions change → whole thing blocked)
**Files:** `test_granular_tool_approval.py`, `test_tool_modification_scenarios.py`
- ✅ `test_server_instructions_change_blocks_everything()` - Tests that:
- Changed instructions are detected via hash comparison
- Individual tool approvals are preserved but instructions are not approved
- Wrapper logic blocks entire server when instructions change
### 6. **Mixed Approval States**
**Files:** `test_granular_tool_approval.py`
- ✅ `test_mixed_approval_states()` - Tests scenarios where:
- Some tools are approved, others are not
- Instructions are approved separately from tools
- Database correctly tracks partial approval states
### 7. **Full Workflow Testing**
**Files:** `test_tool_modification_scenarios.py`
- ✅ `test_dynamic_tool_addition_with_existing_server()` - End-to-end workflow test
- ✅ `test_instruction_change_blocks_all_tools()` - Database-level instruction change test
## ✅ **Core System Components Tested**
### Database Layer (`MCPConfigDatabase`)
- ✅ Granular approval tracking (instructions + individual tools)
- ✅ Cryptographic hashing for change detection
- ✅ Approval status queries (`get_server_approval_status`)
- ✅ Tool-level approval methods (`approve_tool`, `is_tool_approved`)
- ✅ Instruction approval methods (`approve_instructions`, `are_instructions_approved`)
### Wrapper Layer (`MCPWrapperServer`)
- ✅ Granular tool blocking in `call_tool()`
- ✅ Selective tool listing in `list_tools()`
- ✅ Approval preservation in review process
- ✅ Connection-time approval evaluation
### Security Layer
- ✅ Information leakage prevention for unapproved components
- ✅ Error message consistency across approval states
- ✅ Unknown tool pass-through vs. known-but-unapproved tool blocking
## ✅ **Test Quality & Coverage**
### Test Types
- **Unit Tests**: Database logic, approval algorithms, hash functions
- **Integration Tests**: Wrapper behavior with approval system
- **End-to-End Tests**: Full approval workflow with review process
- **Security Tests**: Information leakage prevention
### Edge Cases Covered
- ✅ None/empty instructions handling
- ✅ Tool parameter type changes
- ✅ Tool description modifications
- ✅ Mixed approval states
- ✅ Server approval status preservation during updates
- ✅ Nonexistent tool vs. unapproved tool handling
### Test Infrastructure
- ✅ Reusable test utilities in `test_utils.py`
- ✅ Temporary file handling for config databases
- ✅ Mock server interactions for predictable testing
- ✅ Clear test naming and documentation
## 📊 **Summary Statistics**
- **Total Granular Approval Tests**: 8 new tests
- **Approval Scenarios Covered**: 5/5 required scenarios ✅
- **Test Files**: 2 new dedicated test files
- **Overall Test Suite**: 78 tests passing
- **Coverage Areas**: Database, Wrapper, Security, Workflows
## 🎯 **All Requirements Met**
| Requirement | Status | Test Evidence |
|-------------|--------|---------------|
| New server → totally blocked | ✅ | Existing security tests + new tests |
| New tool → only that tool blocked | ✅ | `test_granular_approval_database_logic` |
| Changed tool → only that tool blocked | ✅ | `test_tool_modification_granular_blocking` |
| Removed tool → disappears with no reapproval | ✅ | `test_tool_removal_no_reapproval_needed` |
| Instructions change → whole thing blocked | ✅ | `test_server_instructions_change_blocks_everything` |
The granular approval system is **comprehensively tested** with appropriate coverage for all specified behaviors.
