earendil-works/pi · error · Error

Validation failed for tool "${toolCall.name}": ${errors} Re

Error message

Validation failed for tool "${toolCall.name}":
${errors}

Received arguments:
${JSON.stringify(toolCall.arguments, null, 2)}

What it means

Error "Validation failed for tool "${toolCall.name}": ${errors} Received arguments: ${JSON.stringify(toolCall.arguments, null, 2)}" thrown in earendil-works/pi.

Source

Thrown at packages/ai/src/utils/validation.ts:349

			} else {
				return validator.Check(coerced) ? coerced : args;
			}
		}
	}

	if (validator.Check(args)) {
		return args;
	}

	const errors =
		validator
			.Errors(args)
			.map((error) => `  - ${formatValidationPath(error)}: ${error.message}`)
			.join("\n") || "Unknown validation error";

	const errorMessage = `Validation failed for tool "${toolCall.name}":\n${errors}\n\nReceived arguments:\n${JSON.stringify(toolCall.arguments, null, 2)}`;

	throw new Error(errorMessage);
}

View on GitHub (pinned to 4af9d21d3b)

Solutions

1. Fix the tool call arguments so they satisfy the schema errors listed in the message.

When it happens

Trigger: Thrown at packages/ai/src/utils/validation.ts:349 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of earendil-works/pi@4af9d21d3b (2026-08-24). Data as JSON: /api/errors/425f4de4b94bffb4. Report an issue: GitHub.