Yet another problem with MCP: every LLM harness that does support it at all supports it poorly and with bugs.

The MCP spec allows MCP servers to send back images to clients (base64-encoded, some json schema). However:

1) codex truncates MCP responses, so it will never receive images at all. This bug has been in existence forever.

2) Claude Code CLI will not pass those resulting images through its multi-modal visual understanding. Indeed, it will create an entirely false hallucination if asked to describe said images.

3) No LLM harness can deal with you bouncing your local MCP server. All require you to restart the harness. None allow reconnection to the MCP server.

I assure you there are many other similar bugs, whose presence makes me think that the LLM companies really don't like MCP, and are bugly-deprecating it.