Exit code for `call` subcommand

[amotl]

Dear Fatih,

thanks a stack for conceiving this excellent tool. We started using it within a CI pipeline to validate the CrateDB MCP Server per mcptools.sh.

While working with mcpt, we discovered the program does not provide a non-zero exit code when it calls an unknown MCP tool. That's a canonical example:

$ mcpt call unknown npx -y @modelcontextprotocol/server-filesystem ~
Error: Unknown tool: unknown

$ echo $?
0

Maybe you can do something about it, so the program can be used for validation purposes conveniently, like in our use case?

With kind regards,
Andreas.

[f]

Oh you're right! I'll implement it ASAP.