Module mcp_tool 

Executor for McpTool workflow nodes.

When a workflow node has kind McpTool, this executor:

1. Resolves the MCP server configuration from the workflow IR.
2. Connects to the MCP server (stdio or HTTP).
3. Sends the initialize handshake.
4. Invokes the specified tool with mapped inputs.
5. Returns the tool’s output as the node result.

Each invocation opens a fresh connection. For Phase 2, connection pooling and persistent stdio processes can be added.

Structs

McpToolExecutor

Executor for mcp_tool nodes.