Change the log level for expected MCP tool execution failures (ToolError, McpError) from warning to debug in fastmcp_client.py to match base_client.py. These errors occur when an LLM calls an MCP tool with missing/invalid arguments - they are expected user-facing issues from external MCP servers, not system errors that should trigger production alerts. Fixes #8845 🤖 Generated with [Letta Code](https://letta.com) Co-authored-by: letta-code <248085862+letta-code@users.noreply.github.com> Co-authored-by: datadog-official[bot] <datadog-official[bot]@users.noreply.github.com> Co-authored-by: Kian Jones <11655409+kianjones9@users.noreply.github.com>