Description

Updated mcp-go version to v0.43.2 and ran go mod tidy

Fixes segfault when specifying an invalid MCP URL:

$ mcptools tools http://127.0.0.1:8000
panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x40 pc=0x77467d]

After updating mcp-go, it just errors out:

$ mcptools tools http://127.0.0.1:8000
Error: init error: transport error: failed to send request: session terminated (404). need to re-initialize
Example: mcp tools npx -y @modelcontextprotocol/server-filesystem ~
exit status 1

Type of change

• Bug fix (non-breaking change which fixes an issue)

How Has This Been Tested?

Run sample streamable HTTP MCP server, connect to it

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules