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feat: Allow renaming tools in ClientGroup #2

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@amirh amirh commented May 13, 2025

Motivation and Context

This stack of changes makes it easier to work with multiple MCP servers from a single client.
This has also been requested in modelcontextprotocol#6

To make the review easier with smaller focused PRs I'm sending a stack or PRs with incremental implementation steps.

This PR:

  1. Enforces that there are no name conflicts across tools for all clients in a ClientGroup.
  2. Provides users with a way to define a function that renames tool names to fix name conflicts.

Still missing:

  • Support for prompts and resources (I want to get the API and semantics around tools approved first).

PR Stack

Note that since I'm sending the PRs from a fork, only the PR at the bottom of the stack is sent to modelcontextprotocol/typescript-sdk. As PRs land I'll update the target repository for the new base PR.

How Has This Been Tested?

  • I added unit tests and they are passing.
  • I ran: npm run build && node dist/esm/examples/client/clientGroupSample.js

Breaking Changes

No breaking changes.

Types of changes

  • Bug fix (non-breaking change which fixes an issue)
  • New feature (non-breaking change which adds functionality)
  • Breaking change (fix or feature that would cause existing functionality to change)
  • Documentation update

Checklist

  • I have read the MCP Documentation
  • My code follows the repository's style guidelines
  • New and existing tests pass locally
  • I have added appropriate error handling
  • I have added or updated documentation as needed

When using tools from multiple servers a name conflict might happen.
In this change we:
1. Throw when a ClientGroup is created with conflicting tool names.
2. Allow the user to specify a component renaming function to fix name conflicts.

We also add a `name` getter in the `Client` class as it provides useful information for solving tool name conflicts.
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