feat(agent): allow variable tool permission modes

apps/docs/openapi-v2-workflows.json

@@ -7995,6 +7995,11 @@
             "enum": ["auto", "force", "none"],
             "description": "When the Agent may call the tool: `auto` lets the model decide, `force` requires a call, and `none` disables it. Omitted means `auto`."
           },
+          "usageControlExpression": {
+            "type": "string",
+            "maxLength": 2048,
+            "description": "Variable-capable tool mode value used when the matching canonical mode is `advanced`. It must resolve to `auto`, `force`, or `none` at execution time."
+          },
           "params": {
             "type": "object",
             "propertyNames": {
@@ -8041,6 +8046,11 @@
                 "type": "string",
                 "enum": ["auto", "force", "none"],
                 "description": "When the Agent may call the tool: `auto` lets the model decide, `force` requires a call, and `none` disables it. Omitted means `auto`."
+              },
+              "usageControlExpression": {
+                "type": "string",
+                "maxLength": 2048,
+                "description": "Variable-capable tool mode value used when the matching canonical mode is `advanced`. It must resolve to `auto`, `force`, or `none` at execution time."
               }
             },
             "required": ["type", "customToolId"],
@@ -8109,6 +8119,11 @@
                 "type": "string",
                 "enum": ["auto", "force", "none"],
                 "description": "When the Agent may call the tool: `auto` lets the model decide, `force` requires a call, and `none` disables it. Omitted means `auto`."
+              },
+              "usageControlExpression": {
+                "type": "string",
+                "maxLength": 2048,
+                "description": "Variable-capable tool mode value used when the matching canonical mode is `advanced`. It must resolve to `auto`, `force`, or `none` at execution time."
               }
             },
             "required": ["type", "schema", "code"],
@@ -8174,6 +8189,11 @@
             "type": "string",
             "enum": ["auto", "force", "none"],
             "description": "When the Agent may call the tool: `auto` lets the model decide, `force` requires a call, and `none` disables it. Omitted means `auto`."
+          },
+          "usageControlExpression": {
+            "type": "string",
+            "maxLength": 2048,
+            "description": "Variable-capable tool mode value used when the matching canonical mode is `advanced`. It must resolve to `auto`, `force`, or `none` at execution time."
           }
         },
         "required": ["type", "params"],
@@ -8282,6 +8302,11 @@
             "type": "string",
             "enum": ["auto", "force", "none"],
             "description": "When the Agent may call the tool: `auto` lets the model decide, `force` requires a call, and `none` disables it. Omitted means `auto`."
+          },
+          "usageControlExpression": {
+            "type": "string",
+            "maxLength": 2048,
+            "description": "Variable-capable tool mode value used when the matching canonical mode is `advanced`. It must resolve to `auto`, `force`, or `none` at execution time."
           }
         },
         "required": ["type", "params"],

apps/sim/app/workspace/[workspaceId]/w/[workflowId]/components/panel/components/editor/components/sub-block/components/tool-input/components/tools/usage-control.tsx

@@ -0,0 +1,115 @@
+import { Button, ChipCombobox, cn, Label, Tooltip } from '@sim/emcn'
+import { ArrowLeftRight } from '@sim/emcn/icons'
+import type { CanonicalMode } from '@/lib/workflows/subblocks/visibility'
+import type { StoredTool } from '@/lib/workflows/tool-input/types'
+import { ShortInput } from '@/app/workspace/[workspaceId]/w/[workflowId]/components/panel/components/editor/components/sub-block/components/short-input'
+
+interface ToolUsageControlProps {
+  blockId: string
+  aggregateSubBlockId: string
+  toolIndex: number
+  tool: StoredTool
+  mode: CanonicalMode
+  supportsForce: boolean
+  disabled: boolean
+  onFixedChange: (value: NonNullable<StoredTool['usageControl']>) => void
+  onExpressionChange: (value: string) => void
+  onModeToggle: () => void
+}
+
+const MODE_OPTIONS = [
+  {
+    value: 'auto',
+    label: 'Auto',
+    suffixElement: <span className='text-[var(--text-tertiary)]'>(model decides)</span>,
+  },
+  {
+    value: 'force',
+    label: 'Force',
+    suffixElement: <span className='text-[var(--text-tertiary)]'>(always use)</span>,
+  },
+  {
+    value: 'none',
+    label: 'None',
+    suffixElement: <span className='text-[var(--text-tertiary)]'>(disable tool)</span>,
+  },
+] as const
+
+export function ToolUsageControl({
+  blockId,
+  aggregateSubBlockId,
+  toolIndex,
+  tool,
+  mode,
+  supportsForce,
+  disabled,
+  onFixedChange,
+  onExpressionChange,
+  onModeToggle,
+}: ToolUsageControlProps) {
+  const toggleLabel = mode === 'advanced' ? 'Switch to selector' : 'Switch to variable'
+
+  return (
+    <div className='subblock-content flex w-full min-w-0 flex-col gap-2.5'>
+      <div className='flex items-center justify-between gap-1.5 pl-0.5'>
+        <Label>Permission Mode</Label>
+        <Tooltip.Root>
+          <Tooltip.Trigger asChild>
+            <Button
+              type='button'
+              variant='ghost'
+              size='icon'
+              className='shrink-0'
+              onClick={onModeToggle}
+              disabled={disabled}
+              aria-label={toggleLabel}
+            >
+              <ArrowLeftRight
+                className={cn(
+                  'size-[12px]!',
+                  mode === 'advanced'
+                    ? 'text-[var(--text-primary)]'
+                    : 'text-[var(--text-secondary)]'
+                )}
+              />
+            </Button>
+          </Tooltip.Trigger>
+          <Tooltip.Content side='top'>{toggleLabel}</Tooltip.Content>
+        </Tooltip.Root>
+      </div>
+      {mode === 'advanced' ? (
+        <ShortInput
+          blockId={blockId}
+          subBlockId={aggregateSubBlockId}
+          config={{
+            id: 'usageControlExpression',
+            title: 'Permission Mode',
+            type: 'short-input',
+          }}
+          value={tool.usageControlExpression ?? ''}
+          onChange={onExpressionChange}
+          placeholder='"auto", "force", or "none"'
+          disabled={disabled}
+          workflowSearchValuePath={[toolIndex, 'usageControlExpression']}
+        />
+      ) : (
+        <ChipCombobox
+          options={MODE_OPTIONS.map((option) => ({
+            ...option,
+            disabled: option.value === 'force' && !supportsForce,
+            suffixElement:
+              option.value === 'force' && !supportsForce ? (
+                <span className='text-[var(--text-tertiary)]'>(not supported by model)</span>
+              ) : (
+                option.suffixElement
+              ),
+            onSelect: () => onFixedChange(option.value),
+          }))}
+          value={tool.usageControl ?? 'auto'}
+          disabled={disabled}
+          aria-label='Permission Mode'
+        />
+      )}
+    </div>
+  )
+}