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fix: correct error handling for unknown tools and resources (#1389)

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Co-authored-by: Felix Weinberger <3823880+felixweinberger@users.noreply.github.com>
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Anthony 2026-03-09 19:17:09 +01:00 • committed by GitHub
commit 108f2f3ab6
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1 changed files with 123 additions and 23 deletions
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18
packages/server/src/server/mcp.ts
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@ -166,15 +166,15 @@ export class McpServer {
);
this.server.setRequestHandler('tools/call', async (request, ctx): Promise<CallToolResult | CreateTaskResult> => {
try {
const tool = this._registeredTools[request.params.name];
if (!tool) {
throw new ProtocolError(ProtocolErrorCode.InvalidParams, `Tool ${request.params.name} not found`);
}
if (!tool.enabled) {
throw new ProtocolError(ProtocolErrorCode.InvalidParams, `Tool ${request.params.name} disabled`);
}
const tool = this._registeredTools[request.params.name];
if (!tool) {
throw new ProtocolError(ProtocolErrorCode.InvalidParams, `Tool ${request.params.name} not found`);
}
if (!tool.enabled) {
throw new ProtocolError(ProtocolErrorCode.InvalidParams, `Tool ${request.params.name} disabled`);
}
try {
const isTaskRequest = !!request.params.task;
const taskSupport = tool.execution?.taskSupport;
const isTaskHandler = 'createTask' in (tool.handler as AnyToolHandler<AnySchema>);
@ -506,7 +506,7 @@ export class McpServer {
}
}
throw new ProtocolError(ProtocolErrorCode.InvalidParams, `Resource ${uri} not found`);
throw new ProtocolError(ProtocolErrorCode.ResourceNotFound, `Resource ${uri} not found`);
});
this._resourceHandlersInitialized = true;