# Your AI database agent needs better errors than “tool failed”

> Source: <https://dev.to/mads_hansen_27b33ebfee4c9/your-ai-database-agent-needs-better-errors-than-tool-failed-4gpa>
> Published: 2026-05-20 01:50:46+00:00

“Tool failed” is not an error message.
It is a debugging tax.
When an AI agent queries a database through MCP, failures need to be structured enough for the agent to recover and specific enough for humans to audit.
A database tool can fail because:
Those should not all collapse into the same generic error.
A useful MCP database error explains:
Longer version: MCP tool errors for AI database agents
The happy path demos well. The unhappy path is what makes the system operable.