Duplicate tool names added by mcptoolset break LLMAgent execution

[LevelbossMike]

Describe the bug
When trying to create an agent that uses two MCPToolsets that add a tool that is named the same across both mcp-servers, the agent returns an error.

To Reproduce
Create an llm agent that tries to add two MCPToolsets that provide a tool that is named the same. E.g. linear mcp and github mcp both provide the list_issues tool.

Expected behavior
Independent MCP servers work independent of how their internal tools are named.

Screenshots

Desktop (please complete the following information):

• OS: MacOS
• TS version/environment: 5.9.3
• ADK version(see maven dependency): 0.2.4

[Varun-S10]

Hi @LevelbossMike, we’ve attempted to reproduce this issue but haven't been able to replicate it on our end. Could you please provide a code example to reproduce the error? This will help us investigate the issue more thoroughly.

[LevelbossMike]

import "dotenv/config";
import {
  LlmAgent,
  MCPToolset,
} from "@google/adk";

// Initialize Toolsets
const githubMcp = new MCPToolset({
  type: "StreamableHTTPConnectionParams",
  url: "https://api.githubcopilot.com/mcp/",
  header: {
    Authorization: `Bearer ${process.env.GITHUB_MCP_TOKEN}`,
  },
});

const linear = new MCPToolset({
  type: "StreamableHTTPConnectionParams",
  url: "https://mcp.linear.app/mcp",
  header: {
    Authorization: `Bearer ${process.env.LINEAR_MCP_TOKEN}`,
  },
});

// --- AGENT DEFINITION ---

export const rootAgent = new LlmAgent({
  name: "personalAssistant",
  model: "gemini-2.5-flash",
  description:
    "Helpful agent.",
  instruction:
    "You are a helpful agent who can query github and linear",
  tools: [githubMcp, linear],
});

[LevelbossMike]

cc @llalitkumarrr @Varun-S10