errors.ts•1.09 kB
import { ErrorCode } from '@modelcontextprotocol/sdk/types.js';
export class McpToolError extends Error {
constructor(
public code: ErrorCode,
message: string,
public data?: unknown
) {
super(message);
this.name = 'McpToolError';
}
}
export function handleToolError(error: unknown): {
isError: true;
content: Array<{ type: 'text'; text: string }>;
} {
if (error instanceof McpToolError) {
return {
isError: true,
content: [{
type: 'text',
text: `Error ${error.code}: ${error.message}${error.data ? `\nDetails: ${JSON.stringify(error.data)}` : ''}`
}]
};
}
// Handle unknown errors
return {
isError: true,
content: [{
type: 'text',
text: `Internal error: ${error instanceof Error ? error.message : 'Unknown error'}`
}]
};
}
export function validateInput<T>(
input: unknown,
validator: (input: unknown) => input is T,
errorMessage: string
): T {
if (!validator(input)) {
throw new McpToolError(
ErrorCode.InvalidParams,
errorMessage
);
}
return input;
}