# Design: Update MCP Server for Organization Members

## MCP Tool Definition Changes

### Tool: create_member
**Current State:**
- Description: "Create a new member. Only firstName is required..."
- Required field: `firstName`
- Missing fields: `memberType`, `companyName`

**Changes Needed:**
- Update description to explain conditional requirements:
  - INDIVIDUAL members require `firstName`
  - ORGANIZATION members require `companyName`
  - `memberType` defaults to INDIVIDUAL if not specified
- Add `memberType` property (enum: INDIVIDUAL, ORGANIZATION)
- Add `companyName` property (string, optional)
- Make `firstName` optional in schema (validation happens server-side)
- Remove `firstName` from required array

### Tool: update_member
**Current State:**
- Missing fields: `memberType`, `companyName`

**Changes Needed:**
- Add `memberType` property (enum: INDIVIDUAL, ORGANIZATION)
- Add `companyName` property (string, optional)
- Update description to mention type transitions

### Tools: list_members and get_member
**Current State:**
- No input changes needed (query tools)
- Output fields come from GraphQL queries

**Changes Needed:**
- No changes to tool definitions
- GraphQL queries will be updated to include new fields

## GraphQL Query Updates

### Query: listMembers (line ~297)
**Add fields:**
```graphql
memberType
companyName
```

### Query: getMember (line ~328)
**Add fields:**
```graphql
memberType
companyName
```

### Mutation: createMember (line ~371)
**Add fields to response:**
```graphql
memberType
companyName
```

### Mutation: updateMember (line ~402)
**Add fields to response:**
```graphql
memberType
companyName
```

## Member Formatting Logic

### Function: formatMember (line ~580)
**Current State:**
- Line 583: Always displays "Name: firstName lastName"
- Assumes all members are individuals

**Changes Needed:**
1. Check `member.memberType` to determine formatting approach
2. For INDIVIDUAL members:
   - Display: `Type: Individual`
   - Display: `Name: firstName lastName`
3. For ORGANIZATION members:
   - Display: `Type: Organization`
   - Display: `Company: companyName`
   - Optionally display: `Contact Person: firstName lastName` (if present)

**Example Output:**

For Individual:
```
ID: 1
Type: Individual
Name: John Doe
Email: john@example.com
...
```

For Organization:
```
ID: 2
Type: Organization
Company: Acme Corporation
Contact Person: Jane Smith
Email: info@acme.com
...
```

### Function: formatMembers (line ~622)
**Current State:**
- Calls `formatMember()` for each member
- No changes needed (delegates to formatMember)

## Schema Discovery

The MCP server includes a `get_graphql_schema` tool that performs introspection. This tool will automatically discover the new `MemberType` enum without code changes, but we should verify it works correctly.

## Implementation Strategy

1. **Update tool definitions** (create_member and update_member)
   - Add memberType and companyName properties
   - Update descriptions
   - Adjust required fields

2. **Update GraphQL queries/mutations**
   - Add memberType and companyName to all member queries
   - Add to all mutation responses

3. **Update formatMember function**
   - Add type checking logic
   - Branch formatting based on memberType
   - Handle both individual and organization display

4. **Test changes**
   - Verify individual member creation (existing behavior)
   - Verify organization member creation (new behavior)
   - Verify member listing shows correct formatting
   - Verify schema introspection includes MemberType enum

## Backward Compatibility

- Existing MCP clients not providing `memberType` will default to INDIVIDUAL (GraphQL default)
- Existing queries will work as before (new fields are optional in responses)
- Member formatting will gracefully handle missing memberType (defaults to INDIVIDUAL)

## File Changes Summary

**Single File to Modify:**
- `src/mcp_server.ts` - All changes are in this file
  - Lines 154-189: update_member tool definition
  - Lines 191-228: update_member tool definition
  - Lines 297-314: listMembers query
  - Lines 328-344: getMember query
  - Lines 371-388: createMember mutation
  - Lines 402-419: updateMember mutation
  - Lines 580-620: formatMember function