Healthcare MCP Server

Instructions

Implementation Reference

• server/usage-service.js:30-38 (handler)

  The main handler function that executes the logic for get_usage_stats, returning session-specific usage statistics including total calls and tool usage breakdown.

  getSessionUsage(sessionId) {
    return {
      status: 'success',
      session_id: sessionId,
      session_start: this.usageStats.session_start,
      total_calls: this.usageStats.total_calls,
      tool_usage: { ...this.usageStats.tool_usage }
    };
  }

• server/index.js:255-262 (schema)

  Tool metadata and input schema definition (empty input schema as it takes no parameters) in the ListTools response.

  {
    name: "get_usage_stats",
    description: "Get usage statistics for the current session",
    inputSchema: {
      type: "object",
      properties: {},
    },
  },

• server/index.js:322-324 (registration)

  Dispatch/registration of the tool handler in the MCP CallToolRequestHandler switch statement.

  case "get_usage_stats":
    result = usageService.getSessionUsage(sessionId);
    break;

• server/http-server.js:67-68 (registration)

  Dispatch/registration of the tool handler in the HTTP server's handleCallTool switch statement for the /mcp/call-tool endpoint.

  case 'get_usage_stats':
    return usageService.getSessionUsage(sessionId);

• server/usage-service.js:16-25 (helper)

  Supporting helper method recordUsage that updates the usage stats, called before tool execution.

  recordUsage(sessionId, toolName) {
    this.usageStats.total_calls++;
    
    if (!this.usageStats.tool_usage[toolName]) {
      this.usageStats.tool_usage[toolName] = 0;
    }
    this.usageStats.tool_usage[toolName]++;
    
    console.error(`Usage recorded: ${toolName} (session: ${sessionId})`);
  }