alt Hacker NewsMCP can wrap things which have stateful processes, debuggers for example. Agents will use batch mode but it is quite limited and due to tool calls always being implemented as synchronous invocations, non-batch mode doesn’t work for tool calls. MCP solves this by giving the agent a handle it can use to refer to in multiple invocations.
Burns a lot of tokens though and if you need more than batch-mode gdb to debug something the chances of an agent solving it today are very slim.
> and due to tool calls always being implemented as synchronous invocations
Claude Code wil happily start long-running processes and put in the background, and is able to refer back to them. You don't need MCP for that - you can hand the model handles to refer to background jobs just fine with just tool-calling.