From 6a72cd064bccb5fda4618671c2da63c4e22c1ef9 Mon Sep 17 00:00:00 2001
From: Jacob MacDonald <jakemac@google.com>
Date: Tue, 5 Aug 2025 15:50:30 -0700
Subject: check for the prompt capability before listing prompts from MCP
 servers (#5616)

Co-authored-by: Jacob Richman <jacob314@gmail.com>
Co-authored-by: Sandy Tao <sandytao520@icloud.com>
---
 packages/core/src/tools/mcp-client.ts | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'packages/core/src/tools/mcp-client.ts')

diff --git a/packages/core/src/tools/mcp-client.ts b/packages/core/src/tools/mcp-client.ts
index 00f2197a..26244d9e 100644
--- a/packages/core/src/tools/mcp-client.ts
+++ b/packages/core/src/tools/mcp-client.ts
@@ -496,6 +496,9 @@ export async function discoverPrompts(
   promptRegistry: PromptRegistry,
 ): Promise<Prompt[]> {
   try {
+    // Only request prompts if the server supports them.
+    if (mcpClient.getServerCapabilities()?.prompts == null) return [];
+
     const response = await mcpClient.request(
       { method: 'prompts/list', params: {} },
       ListPromptsResultSchema,
-- 
cgit v1.2.3