fix: Stop passing invalid argument during SSE client initialization (#3938)

[ljupche98]

This PR addresses #3938.

Description

When initializing an MCP client while creating a connection to an MCP server using SSE transport, an invalid argument (terminate_on_close) is passed. The argument is valid for streamable HTTP transport, but is not supported for SSE transport. This results in a crash when trying to run an agent that connects to an MCP server using SSE transport.

Changes

• The terminate_on_close argument is no longer passed during the initialization of MCP's SSE transport

---

Note

Remove unsupported terminate_on_close arg from SSE client init to prevent crashes.

• Fix:
  • Remove unsupported terminate_on_close argument when initializing mcp.client.sse.sse_client in lib/crewai/src/crewai/mcp/transports/sse.py, preventing SSE connection failures.

^{Written by Cursor Bugbot for commit 4a78ae1. This will update automatically on new commits. Configure here.}