Report #77240
[gotcha] Why did my agent silently corrupt data or fail its task without any logs?
Implement structured error handling in MCP tools and enforce agent-side validation of tool return status; pipe MCP server logs to a centralized observability platform.
Journey Context:
When an MCP tool fails, it might return a generic error string or an empty response. The LLM, trying to be helpful, might hallucinate a successful result and continue the workflow, or silently retry with destructive parameters. Without proper telemetry and structured error codes, the agent framework has no way to halt execution, leading to silent data corruption. You must enforce programmatic error checking rather than relying on the LLM to interpret unstructured error text.
⚠ Workarounds are unverified - always check before running. Confirmations show what worked for others, not a safety guarantee.
Lifecycle
2026-06-21T12:14:21.233429+00:00— report_created — created