diff --git a/packages/opencode/src/cli/cmd/tui/routes/session/index.tsx b/packages/opencode/src/cli/cmd/tui/routes/session/index.tsx
index bbd5eac1a2..6f18f02a98 100644
--- a/packages/opencode/src/cli/cmd/tui/routes/session/index.tsx
+++ b/packages/opencode/src/cli/cmd/tui/routes/session/index.tsx
@@ -1742,6 +1742,7 @@ function InlineTool(props: {
   const sync = useSync()
   const renderer = useRenderer()
   const [hover, setHover] = createSignal(false)
+  const [errorExpanded, setErrorExpanded] = createSignal(false)
 
   const permission = createMemo(() => {
     const callID = sync.data.permission[ctx.sessionID]?.at(0)?.tool?.callID
@@ -1749,13 +1750,6 @@ function InlineTool(props: {
     return callID === props.part.callID
   })
 
-  const fg = createMemo(() => {
-    if (permission()) return theme.warning
-    if (hover() && props.onClick) return theme.text
-    if (props.complete) return theme.textMuted
-    return theme.text
-  })
-
   const error = createMemo(() => (props.part.state.status === "error" ? props.part.state.error : undefined))
 
   const denied = createMemo(
@@ -1766,14 +1760,28 @@ function InlineTool(props: {
       error()?.includes("user dismissed"),
   )
 
+  const failed = createMemo(() => Boolean(error() && !denied()))
+  const clickable = createMemo(() => Boolean(props.onClick || failed()))
+  const fg = createMemo(() => {
+    if (permission()) return theme.warning
+    if (failed()) return theme.error
+    if (hover() && props.onClick) return theme.text
+    if (props.complete) return theme.textMuted
+    return theme.text
+  })
+
   return (
     <box
       marginTop={margin()}
       paddingLeft={3}
-      onMouseOver={() => props.onClick && setHover(true)}
+      onMouseOver={() => clickable() && setHover(true)}
       onMouseOut={() => setHover(false)}
       onMouseUp={() => {
         if (renderer.getSelection()?.getSelectedText()) return
+        if (failed()) {
+          setErrorExpanded((value) => !value)
+          return
+        }
         props.onClick?.()
       }}
       renderBefore={function () {
@@ -1804,19 +1812,23 @@ function InlineTool(props: {
             <box flexDirection="row">
               <text
                 width={INLINE_TOOL_ICON_WIDTH}
-                fg={props.iconColor ?? fg()}
+                fg={failed() ? theme.error : (props.iconColor ?? fg())}
                 attributes={denied() ? TextAttributes.STRIKETHROUGH : undefined}
               >
                 {props.icon}
               </text>
-              <text flexGrow={1} fg={fg()} attributes={denied() ? TextAttributes.STRIKETHROUGH : undefined}>
+              <text
+                flexGrow={1}
+                fg={failed() ? theme.error : fg()}
+                attributes={denied() ? TextAttributes.STRIKETHROUGH : undefined}
+              >
                 {props.children}
               </text>
             </box>
           </Show>
         </Match>
       </Switch>
-      <Show when={error() && !denied()}>
+      <Show when={failed() && errorExpanded()}>
         <box paddingLeft={INLINE_TOOL_ICON_WIDTH}>
           <text fg={theme.error}>{error()}</text>
         </box>
diff --git a/packages/opencode/test/cli/tui/__snapshots__/inline-tool-wrap-snapshot.test.tsx.snap b/packages/opencode/test/cli/tui/__snapshots__/inline-tool-wrap-snapshot.test.tsx.snap
index 89987234dd..6cb0df1e2e 100644
--- a/packages/opencode/test/cli/tui/__snapshots__/inline-tool-wrap-snapshot.test.tsx.snap
+++ b/packages/opencode/test/cli/tui/__snapshots__/inline-tool-wrap-snapshot.test.tsx.snap
@@ -1,6 +1,16 @@
 // Bun Snapshot v1, https://bun.sh/docs/test/snapshots
 
 exports[`TUI inline tool wrapping snapshots consecutive grep, glob, and read rows at a narrow width 1`] = `
+"   ✱ Grep "OPENCODE.*DB|database|sqlite|drizzle|dev.*db|data.
+     *dir|xdg|APPDATA" in packages/opencode/src (151 matches)
+   ✱ Glob "**/*db*" in packages/opencode (6 matches)
+   → Read packages/opencode/src/storage/db.ts [offset=1, limit=130]
+   → Read packages/opencode/src/index.ts [offset=1, limit=100]
+   ✱ Grep "export const OPENCODE_DB|OPENCODE_DB|OPENCODE_DEV|Global\\.
+     Path\\.data|data =" in packages/opencode/src (115 matches)"
+`;
+
+exports[`TUI inline tool wrapping snapshots expanded tool errors under the tool text 1`] = `
 "   ✱ Grep "OPENCODE.*DB|database|sqlite|drizzle|dev.*db|data.
      *dir|xdg|APPDATA" in packages/opencode/src (151 matches)
    ✱ Glob "**/*db*" in packages/opencode (6 matches)
diff --git a/packages/opencode/test/cli/tui/inline-tool-wrap-snapshot.test.tsx b/packages/opencode/test/cli/tui/inline-tool-wrap-snapshot.test.tsx
index 318847e946..c7aa4708ec 100644
--- a/packages/opencode/test/cli/tui/inline-tool-wrap-snapshot.test.tsx
+++ b/packages/opencode/test/cli/tui/inline-tool-wrap-snapshot.test.tsx
@@ -39,7 +39,7 @@ const tools: readonly ToolFixture[] = [
   },
 ] as const
 
-function InlineToolRow(props: { item: ToolFixture }) {
+function InlineToolRow(props: { item: ToolFixture; errorExpanded?: boolean }) {
   const [margin, setMargin] = createSignal(0)
 
   return (
@@ -56,7 +56,7 @@ function InlineToolRow(props: { item: ToolFixture }) {
         <text width={INLINE_TOOL_ICON_WIDTH}>{props.item.icon}</text>
         <text flexGrow={1}>{props.item.label}</text>
       </box>
-      {props.item.error && (
+      {props.item.error && props.errorExpanded && (
         <box paddingLeft={INLINE_TOOL_ICON_WIDTH}>
           <text>{props.item.error}</text>
         </box>
@@ -65,11 +65,11 @@ function InlineToolRow(props: { item: ToolFixture }) {
   )
 }
 
-function Fixture() {
+function Fixture(props: { errorExpanded?: boolean }) {
   return (
     <box flexDirection="column" width={72}>
       <box flexDirection="column">
-        <For each={tools}>{(item) => <InlineToolRow item={item} />}</For>
+        <For each={tools}>{(item) => <InlineToolRow item={item} errorExpanded={props.errorExpanded} />}</For>
       </box>
     </box>
   )
@@ -90,4 +90,19 @@ describe("TUI inline tool wrapping", () => {
         .trimEnd(),
     ).toMatchSnapshot()
   })
+
+  test("snapshots expanded tool errors under the tool text", async () => {
+    testSetup = await testRender(() => <Fixture errorExpanded />, { width: 72, height: 12 })
+    await testSetup.renderOnce()
+    await testSetup.renderOnce()
+
+    expect(
+      testSetup
+        .captureCharFrame()
+        .split("\n")
+        .map((line) => line.trimEnd())
+        .join("\n")
+        .trimEnd(),
+    ).toMatchSnapshot()
+  })
 })