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fix: properly type tool error content in getAITools #781

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fix: properly type tool error content in getAITools #781

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16dfd92
fix: properly type tool error content in getAITools
HueCodes Jan 14, 2026
c17c8b1
fix: cast result.content to fix TS18046 error
HueCodes Jan 15, 2026
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5 changes: 5 additions & 0 deletions .changeset/fix-mcp-error-type.md
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Original file line number Diff line number Diff line change
@@ -0,0 +1,5 @@
---
"agents": patch
---

fix: properly type tool error content in getAITools
11 changes: 9 additions & 2 deletions packages/agents/src/mcp/client.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -941,8 +941,15 @@ export class MCPClientManager {
serverId: tool.serverId
});
if (result.isError) {
// @ts-expect-error TODO we should fix this
throw new Error(result.content[0].text);
const content = result.content as
| Array<{ type: string; text?: string }>
| undefined;
const textContent = content?.[0];
const message =
textContent?.type === "text" && textContent.text
? textContent.text
: "Tool call failed";
throw new Error(message);
}
return result;
},
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