Added default mcp tool call timeout from env

[haydenrear]

Add a default fallback from an env for tool call timeout from the client side.

Motivation and Context

Tool calls timeout at 60 seconds. For any tool call that is an agent, for instance, it's too low.

How Has This Been Tested?

Unit tests, and I tested by running it in claude-agent-sdk (replacing the env).

Breaking Changes

Types of changes

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

Checklist

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

Additional context

[changeset-bot]

🦋 Changeset detected

Latest commit: 1fa749d

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@modelcontextprotocol/core	Minor

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