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fix(server): handle undefined arguments for tools with all optional params (#1404)

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Co-authored-by: Felix Weinberger <3823880+felixweinberger@users.noreply.github.com>
Co-authored-by: Felix Weinberger <fweinberger@anthropic.com>
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suram 2026-01-24 03:36:40 +09:00 • committed by GitHub
commit b2326afea6
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1 changed files with 71 additions and 1 deletions
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packages/server/src/server/mcp.ts
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@ -271,7 +271,7 @@ export class McpServer {
// If that fails, use the schema directly (for union/intersection/etc)
const inputObj = normalizeObjectSchema(tool.inputSchema);
const schemaToParse = inputObj ?? (tool.inputSchema as AnySchema);
const parseResult = await safeParseAsync(schemaToParse, args);
const parseResult = await safeParseAsync(schemaToParse, args ?? {});
if (!parseResult.success) {
const error = 'error' in parseResult ? parseResult.error : 'Unknown error';
const errorMessage = getParseErrorMessage(error);