[BUG] observability-agent logs "Unexpected content type" errors when polling kagent-tools MCP server

[dirien]

Description

The observability-agent continuously logs mcp.client.streamable_http - ERROR - Unexpected content type: every 30 seconds when trying to communicate with the kagent-tools MCP server. The actual tool calls work fine, but these errors spam the logs and make it harder to spot real issues.

Environment

• Kagent version: 0.7.8 (helm chart)
• Kubernetes: DigitalOcean managed K8s
• observability-agent connecting to kagent-tools.kagent:8084/mcp

Steps to Reproduce

1. Deploy kagent with observability-agent enabled
2. Check the observability-agent pod logs: kubectl logs -n kagent -l app.kubernetes.io/name=observability-agent

Observed Behavior

2026-01-11 20:52:10,395 - httpx - INFO - HTTP Request: POST http://kagent-tools.kagent:8084/mcp "HTTP/1.1 200 OK"
2026-01-11 20:52:10,396 - mcp.client.streamable_http - ERROR - Unexpected content type: 
2026-01-11 20:52:40,408 - httpx - INFO - HTTP Request: POST http://kagent-tools.kagent:8084/mcp "HTTP/1.1 200 OK"
2026-01-11 20:52:40,408 - mcp.client.streamable_http - ERROR - Unexpected content type: 

This repeats every 30 seconds. The HTTP request returns 200 OK, but the Content-Type header seems to be empty or unexpected.

Expected Behavior

Either:

• The health check responses should include the correct Content-Type header
• Or these polling errors shouldn't be logged at ERROR level if they don't affect functionality

Notes

• Actual tool calls to kagent-tools work fine (kubectl commands execute successfully)
• The error appears to come from the MCP Python SDK's streamable_http client
• Related upstream issues:
  • Cannot handle Unexpected content type when initializing MCP session modelcontextprotocol/python-sdk#1382
  • Errors with Streamble HTTP modelcontextprotocol/python-sdk#1072

[Mehmoodhassan]

We are facing the same issue as well. Is there any update on this?