diff --git a/packages/coding-agent/src/core/agent-session.ts b/packages/coding-agent/src/core/agent-session.ts
index 0b6a5814..5dca6ae2 100644
--- a/packages/coding-agent/src/core/agent-session.ts
+++ b/packages/coding-agent/src/core/agent-session.ts
@@ -2180,9 +2180,7 @@ export class AgentSession {
 		this._toolPromptSnippets = new Map(
 			allCustomTools
 				.map((registeredTool) => {
-					const snippet = this._normalizePromptSnippet(
-						registeredTool.definition.promptSnippet ?? registeredTool.definition.description,
-					);
+					const snippet = this._normalizePromptSnippet(registeredTool.definition.promptSnippet);
 					return snippet ? ([registeredTool.definition.name, snippet] as const) : undefined;
 				})
 				.filter((entry): entry is readonly [string, string] => entry !== undefined),
@@ -2316,8 +2314,8 @@ export class AgentSession {
 		if (isContextOverflow(message, contextWindow)) return false;
 
 		const err = message.errorMessage;
-		// Match: overloaded_error, rate limit, 429, 500, 502, 503, 504, service unavailable, connection errors, fetch failed, terminated, retry delay exceeded
-		return /overloaded|rate.?limit|too many requests|429|500|502|503|504|service.?unavailable|server.?error|internal.?error|connection.?error|connection.?refused|other side closed|fetch failed|upstream.?connect|reset before headers|terminated|retry delay/i.test(
+		// Match: overloaded_error, provider returned error, rate limit, 429, 500, 502, 503, 504, service unavailable, connection errors, fetch failed, terminated, retry delay exceeded
+		return /overloaded|provider.?returned.?error|rate.?limit|too many requests|429|500|502|503|504|service.?unavailable|server.?error|internal.?error|connection.?error|connection.?refused|other side closed|fetch failed|upstream.?connect|reset before headers|terminated|retry delay/i.test(
 			err,
 		);
 	}