Function adcpError

adcpError(
code: StandardErrorCode | string & {},
options: AdcpErrorOptions,
): AdcpErrorResponse
Build an L3-compliant MCP tool error response with all three transport layers:
1. structuredContent.adcp_error — programmatic extraction (L3)
2. content[0].text — JSON text fallback (L2)
3. isError: true — MCP error signal
Recovery is auto-populated from the standard error code table when not provided.
Parameters
- code: StandardErrorCode | string & {}
- options: AdcpErrorOptions
Returns AdcpErrorResponse
Example
```
import { adcpError } from '@adcp/client';

server.tool("get_products", schema, async ({ query }) => {
  if (!products.length) {
    return adcpError('PRODUCT_NOT_FOUND', {
      message: 'No products match query',
      field: 'query',
      suggestion: 'Try a broader search term',
    });
  }
  return { content: [...], structuredContent: { products } };
});
```
- Defined in src/lib/server/errors.ts:68