diff --git a/invokeai/frontend/web/src/common/components/IAIButton.tsx b/invokeai/frontend/web/src/common/components/IAIButton.tsx
index d1e77537cc..4058296aaf 100644
--- a/invokeai/frontend/web/src/common/components/IAIButton.tsx
+++ b/invokeai/frontend/web/src/common/components/IAIButton.tsx
@@ -8,8 +8,8 @@ import {
 import { memo, ReactNode } from 'react';
 
 export interface IAIButtonProps extends ButtonProps {
-  tooltip?: string;
-  tooltipProps?: Omit<TooltipProps, 'children'>;
+  tooltip?: TooltipProps['label'];
+  tooltipProps?: Omit<TooltipProps, 'children' | 'label'>;
   isChecked?: boolean;
   children: ReactNode;
 }
diff --git a/invokeai/frontend/web/src/common/components/IAIIconButton.tsx b/invokeai/frontend/web/src/common/components/IAIIconButton.tsx
index ed1514055e..0a42430689 100644
--- a/invokeai/frontend/web/src/common/components/IAIIconButton.tsx
+++ b/invokeai/frontend/web/src/common/components/IAIIconButton.tsx
@@ -9,8 +9,8 @@ import { memo } from 'react';
 
 export type IAIIconButtonProps = IconButtonProps & {
   role?: string;
-  tooltip?: string;
-  tooltipProps?: Omit<TooltipProps, 'children'>;
+  tooltip?: TooltipProps['label'];
+  tooltipProps?: Omit<TooltipProps, 'children' | 'label'>;
   isChecked?: boolean;
 };
 
diff --git a/invokeai/frontend/web/src/common/hooks/useIsReadyToInvoke.ts b/invokeai/frontend/web/src/common/hooks/useIsReadyToInvoke.ts
index f43ec1851f..ac770e3787 100644
--- a/invokeai/frontend/web/src/common/hooks/useIsReadyToInvoke.ts
+++ b/invokeai/frontend/web/src/common/hooks/useIsReadyToInvoke.ts
@@ -2,71 +2,104 @@ import { createSelector } from '@reduxjs/toolkit';
 import { stateSelector } from 'app/store/store';
 import { useAppSelector } from 'app/store/storeHooks';
 import { defaultSelectorOptions } from 'app/store/util/defaultMemoizeOptions';
-// import { validateSeedWeights } from 'common/util/seedWeightPairs';
+import { isInvocationNode } from 'features/nodes/types/types';
 import { activeTabNameSelector } from 'features/ui/store/uiSelectors';
-import { forEach } from 'lodash-es';
-import { NON_REFINER_BASE_MODELS } from 'services/api/constants';
-import { modelsApi } from '../../services/api/endpoints/models';
+import { forEach, map } from 'lodash-es';
+import { getConnectedEdges } from 'reactflow';
 
-const readinessSelector = createSelector(
+const selector = createSelector(
   [stateSelector, activeTabNameSelector],
   (state, activeTabName) => {
-    const { generation, system } = state;
-    const { initialImage } = generation;
+    const { generation, system, nodes } = state;
+    const { initialImage, model } = generation;
 
     const { isProcessing, isConnected } = system;
 
-    let isReady = true;
-    const reasonsWhyNotReady: string[] = [];
+    const reasons: string[] = [];
 
-    if (activeTabName === 'img2img' && !initialImage) {
-      isReady = false;
-      reasonsWhyNotReady.push('No initial image selected');
-    }
-
-    const { isSuccess: mainModelsSuccessfullyLoaded } =
-      modelsApi.endpoints.getMainModels.select(NON_REFINER_BASE_MODELS)(state);
-    if (!mainModelsSuccessfullyLoaded) {
-      isReady = false;
-      reasonsWhyNotReady.push('Models are not loaded');
-    }
-
-    // TODO: job queue
     // Cannot generate if already processing an image
     if (isProcessing) {
-      isReady = false;
-      reasonsWhyNotReady.push('System Busy');
+      reasons.push('System busy');
     }
 
     // Cannot generate if not connected
     if (!isConnected) {
-      isReady = false;
-      reasonsWhyNotReady.push('System Disconnected');
+      reasons.push('System disconnected');
     }
 
-    // // Cannot generate variations without valid seed weights
-    // if (
-    //   shouldGenerateVariations &&
-    //   (!(validateSeedWeights(seedWeights) || seedWeights === '') || seed === -1)
-    // ) {
-    //   isReady = false;
-    //   reasonsWhyNotReady.push('Seed-Weights badly formatted.');
-    // }
+    if (activeTabName === 'img2img' && !initialImage) {
+      reasons.push('No initial image selected');
+    }
 
-    forEach(state.controlNet.controlNets, (controlNet, id) => {
-      if (!controlNet.model) {
-        isReady = false;
-        reasonsWhyNotReady.push(`ControlNet ${id} has no model selected.`);
+    if (activeTabName === 'nodes' && nodes.shouldValidateGraph) {
+      nodes.nodes.forEach((node) => {
+        if (!isInvocationNode(node)) {
+          return;
+        }
+
+        const nodeTemplate = nodes.nodeTemplates[node.data.type];
+
+        if (!nodeTemplate) {
+          // Node type not found
+          reasons.push('Missing node template');
+          return;
+        }
+
+        const connectedEdges = getConnectedEdges([node], nodes.edges);
+
+        forEach(node.data.inputs, (field) => {
+          const fieldTemplate = nodeTemplate.inputs[field.name];
+          const hasConnection = connectedEdges.some(
+            (edge) =>
+              edge.target === node.id && edge.targetHandle === field.name
+          );
+
+          if (!fieldTemplate) {
+            reasons.push('Missing field template');
+            return;
+          }
+
+          if (fieldTemplate.required && !field.value && !hasConnection) {
+            reasons.push(
+              `${node.data.label || nodeTemplate.title} -> ${
+                field.label || fieldTemplate.title
+              } missing input`
+            );
+            return;
+          }
+        });
+      });
+    } else {
+      if (!model) {
+        reasons.push('No model selected');
       }
-    });
 
-    // All good
-    return { isReady, reasonsWhyNotReady };
+      if (state.controlNet.isEnabled) {
+        map(state.controlNet.controlNets).forEach((controlNet, i) => {
+          if (!controlNet.isEnabled) {
+            return;
+          }
+          if (!controlNet.model) {
+            reasons.push(`ControlNet ${i + 1} has no model selected.`);
+          }
+
+          if (
+            !controlNet.controlImage ||
+            (!controlNet.processedControlImage &&
+              controlNet.processorType !== 'none')
+          ) {
+            reasons.push(`ControlNet ${i + 1} has no control image`);
+          }
+        });
+      }
+    }
+
+    return { isReady: !reasons.length, isProcessing, reasons };
   },
   defaultSelectorOptions
 );
 
 export const useIsReadyToInvoke = () => {
-  const { isReady } = useAppSelector(readinessSelector);
-  return isReady;
+  const { isReady, isProcessing, reasons } = useAppSelector(selector);
+  return { isReady, isProcessing, reasons };
 };
diff --git a/invokeai/frontend/web/src/features/nodes/components/flow/panels/TopCenterPanel/NodeInvokeButton.tsx b/invokeai/frontend/web/src/features/nodes/components/flow/panels/TopCenterPanel/NodeInvokeButton.tsx
index f207e910b1..decaea19e8 100644
--- a/invokeai/frontend/web/src/features/nodes/components/flow/panels/TopCenterPanel/NodeInvokeButton.tsx
+++ b/invokeai/frontend/web/src/features/nodes/components/flow/panels/TopCenterPanel/NodeInvokeButton.tsx
@@ -2,10 +2,9 @@ import { Box } from '@chakra-ui/react';
 import { userInvoked } from 'app/store/actions';
 import { useAppDispatch, useAppSelector } from 'app/store/storeHooks';
 import IAIButton, { IAIButtonProps } from 'common/components/IAIButton';
-import IAIIconButton, {
-  IAIIconButtonProps,
-} from 'common/components/IAIIconButton';
-import { selectIsReadyNodes } from 'features/nodes/store/selectors';
+import { IAIIconButtonProps } from 'common/components/IAIIconButton';
+import { useIsReadyToInvoke } from 'common/hooks/useIsReadyToInvoke';
+import { InvokeButtonTooltipContent } from 'features/parameters/components/ProcessButtons/InvokeButton';
 import ProgressBar from 'features/system/components/ProgressBar';
 import { activeTabNameSelector } from 'features/ui/store/uiSelectors';
 import { memo, useCallback } from 'react';
@@ -14,15 +13,13 @@ import { useTranslation } from 'react-i18next';
 import { FaPlay } from 'react-icons/fa';
 
 interface InvokeButton
-  extends Omit<IAIButtonProps | IAIIconButtonProps, 'aria-label'> {
-  iconButton?: boolean;
-}
+  extends Omit<IAIButtonProps | IAIIconButtonProps, 'aria-label'> {}
 
 const NodeInvokeButton = (props: InvokeButton) => {
-  const { iconButton = false, ...rest } = props;
+  const { ...rest } = props;
   const dispatch = useAppDispatch();
   const activeTabName = useAppSelector(activeTabNameSelector);
-  const isReady = useAppSelector(selectIsReadyNodes);
+  const { isReady, isProcessing } = useIsReadyToInvoke();
   const handleInvoke = useCallback(() => {
     dispatch(userInvoked('nodes'));
   }, [dispatch]);
@@ -58,37 +55,24 @@ const NodeInvokeButton = (props: InvokeButton) => {
             <ProgressBar />
           </Box>
         )}
-        {iconButton ? (
-          <IAIIconButton
-            aria-label={t('parameters.invoke')}
-            type="submit"
-            icon={<FaPlay />}
-            isDisabled={!isReady}
-            onClick={handleInvoke}
-            flexGrow={1}
-            w="100%"
-            tooltip={t('parameters.invoke')}
-            tooltipProps={{ placement: 'bottom' }}
-            colorScheme="accent"
-            id="invoke-button"
-            {...rest}
-          />
-        ) : (
-          <IAIButton
-            aria-label={t('parameters.invoke')}
-            type="submit"
-            isDisabled={!isReady}
-            onClick={handleInvoke}
-            flexGrow={1}
-            w="100%"
-            colorScheme="accent"
-            id="invoke-button"
-            fontWeight={700}
-            {...rest}
-          >
-            Invoke
-          </IAIButton>
-        )}
+        <IAIButton
+          tooltip={<InvokeButtonTooltipContent />}
+          aria-label={t('parameters.invoke')}
+          type="submit"
+          isDisabled={!isReady}
+          onClick={handleInvoke}
+          flexGrow={1}
+          w="100%"
+          colorScheme="accent"
+          id="invoke-button"
+          leftIcon={isProcessing ? undefined : <FaPlay />}
+          fontWeight={700}
+          isLoading={isProcessing}
+          loadingText={t('parameters.invoke')}
+          {...rest}
+        >
+          Invoke
+        </IAIButton>
       </Box>
     </Box>
   );
diff --git a/invokeai/frontend/web/src/features/nodes/components/flow/panels/TopLeftPanel/TopLeftPanel.tsx b/invokeai/frontend/web/src/features/nodes/components/flow/panels/TopLeftPanel/TopLeftPanel.tsx
index 5f00604afa..67471b7e3d 100644
--- a/invokeai/frontend/web/src/features/nodes/components/flow/panels/TopLeftPanel/TopLeftPanel.tsx
+++ b/invokeai/frontend/web/src/features/nodes/components/flow/panels/TopLeftPanel/TopLeftPanel.tsx
@@ -1,8 +1,7 @@
 import { useAppDispatch } from 'app/store/storeHooks';
-import IAIIconButton from 'common/components/IAIIconButton';
+import IAIButton from 'common/components/IAIButton';
 import { addNodePopoverOpened } from 'features/nodes/store/nodesSlice';
 import { memo, useCallback } from 'react';
-import { FaPlus } from 'react-icons/fa';
 import { Panel } from 'reactflow';
 
 const TopLeftPanel = () => {
@@ -14,12 +13,9 @@ const TopLeftPanel = () => {
 
   return (
     <Panel position="top-left">
-      <IAIIconButton
-        aria-label="Add Node"
-        tooltip="Add Node"
-        onClick={handleOpenAddNodePopover}
-        icon={<FaPlus />}
-      />
+      <IAIButton aria-label="Add Node" onClick={handleOpenAddNodePopover}>
+        Add Node
+      </IAIButton>
     </Panel>
   );
 };
diff --git a/invokeai/frontend/web/src/features/nodes/store/selectors.ts b/invokeai/frontend/web/src/features/nodes/store/selectors.ts
deleted file mode 100644
index 41a608baa3..0000000000
--- a/invokeai/frontend/web/src/features/nodes/store/selectors.ts
+++ /dev/null
@@ -1,92 +0,0 @@
-import { createSelector } from '@reduxjs/toolkit';
-import { stateSelector } from 'app/store/store';
-import { defaultSelectorOptions } from 'app/store/util/defaultMemoizeOptions';
-// import { validateSeedWeights } from 'common/util/seedWeightPairs';
-import { every } from 'lodash-es';
-import { getConnectedEdges } from 'reactflow';
-import { isInvocationNode } from '../types/types';
-import { NodesState } from './types';
-
-export const selectIsReadyNodes = createSelector(
-  [stateSelector],
-  (state) => {
-    const { nodes, system } = state;
-    const { isProcessing, isConnected } = system;
-
-    if (isProcessing || !isConnected) {
-      // Cannot generate if already processing an image
-      return false;
-    }
-
-    if (!nodes.shouldValidateGraph) {
-      return true;
-    }
-
-    const isGraphReady = every(nodes.nodes, (node) => {
-      if (!isInvocationNode(node)) {
-        return true;
-      }
-
-      const nodeTemplate = nodes.nodeTemplates[node.data.type];
-
-      if (!nodeTemplate) {
-        // Node type not found
-        return false;
-      }
-
-      const connectedEdges = getConnectedEdges([node], nodes.edges);
-
-      const isNodeValid = every(node.data.inputs, (field) => {
-        const fieldTemplate = nodeTemplate.inputs[field.name];
-        const hasConnection = connectedEdges.some(
-          (edge) => edge.target === node.id && edge.targetHandle === field.name
-        );
-
-        if (!fieldTemplate) {
-          // Field type not found
-          return false;
-        }
-
-        if (fieldTemplate.required && !field.value && !hasConnection) {
-          // Required field is empty or does not have a connection
-          return false;
-        }
-
-        // ok
-        return true;
-      });
-
-      return isNodeValid;
-    });
-
-    return isGraphReady;
-  },
-  defaultSelectorOptions
-);
-
-export const getNodeAndTemplate = (nodeId: string, nodes: NodesState) => {
-  const node = nodes.nodes.find((node) => node.id === nodeId);
-  const nodeTemplate = nodes.nodeTemplates[node?.data.type ?? ''];
-
-  return { node, nodeTemplate };
-};
-
-export const getInputFieldAndTemplate = (
-  nodeId: string,
-  fieldName: string,
-  nodes: NodesState
-) => {
-  const node = nodes.nodes
-    .filter(isInvocationNode)
-    .find((node) => node.id === nodeId);
-  const nodeTemplate = nodes.nodeTemplates[node?.data.type ?? ''];
-
-  if (!node || !nodeTemplate) {
-    return;
-  }
-
-  const field = node.data.inputs[fieldName];
-  const fieldTemplate = nodeTemplate.inputs[fieldName];
-
-  return { field, fieldTemplate };
-};
diff --git a/invokeai/frontend/web/src/features/parameters/components/ProcessButtons/InvokeButton.tsx b/invokeai/frontend/web/src/features/parameters/components/ProcessButtons/InvokeButton.tsx
index 3880f717b9..2332a91c7d 100644
--- a/invokeai/frontend/web/src/features/parameters/components/ProcessButtons/InvokeButton.tsx
+++ b/invokeai/frontend/web/src/features/parameters/components/ProcessButtons/InvokeButton.tsx
@@ -1,4 +1,12 @@
-import { Box, ChakraProps, Tooltip } from '@chakra-ui/react';
+import {
+  Box,
+  ChakraProps,
+  Divider,
+  Flex,
+  ListItem,
+  Text,
+  UnorderedList,
+} from '@chakra-ui/react';
 import { createSelector } from '@reduxjs/toolkit';
 import { userInvoked } from 'app/store/actions';
 import { stateSelector } from 'app/store/store';
@@ -13,7 +21,7 @@ import { clampSymmetrySteps } from 'features/parameters/store/generationSlice';
 import ProgressBar from 'features/system/components/ProgressBar';
 import { selectIsBusy } from 'features/system/store/systemSelectors';
 import { activeTabNameSelector } from 'features/ui/store/uiSelectors';
-import { useCallback } from 'react';
+import { memo, useCallback } from 'react';
 import { useHotkeys } from 'react-hotkeys-hook';
 import { useTranslation } from 'react-i18next';
 import { FaPlay } from 'react-icons/fa';
@@ -53,9 +61,8 @@ interface InvokeButton
 export default function InvokeButton(props: InvokeButton) {
   const { iconButton = false, ...rest } = props;
   const dispatch = useAppDispatch();
-  const isReady = useIsReadyToInvoke();
-  const { isBusy, autoAddBoardId, activeTabName } = useAppSelector(selector);
-  const autoAddBoardName = useBoardName(autoAddBoardId);
+  const { isReady, isProcessing } = useIsReadyToInvoke();
+  const { activeTabName } = useAppSelector(selector);
 
   const handleInvoke = useCallback(() => {
     dispatch(clampSymmetrySteps());
@@ -94,53 +101,80 @@ export default function InvokeButton(props: InvokeButton) {
             <ProgressBar />
           </Box>
         )}
-        <Tooltip
-          placement="top"
-          hasArrow
-          openDelay={500}
-          label={
-            autoAddBoardId ? `Auto-Adding to ${autoAddBoardName}` : undefined
-          }
-        >
-          {iconButton ? (
-            <IAIIconButton
-              aria-label={t('parameters.invoke')}
-              type="submit"
-              icon={<FaPlay />}
-              isDisabled={!isReady || isBusy}
-              onClick={handleInvoke}
-              tooltip={t('parameters.invoke')}
-              tooltipProps={{ placement: 'top' }}
-              colorScheme="accent"
-              id="invoke-button"
-              {...rest}
-              sx={{
-                w: 'full',
-                flexGrow: 1,
-                ...(isBusy ? IN_PROGRESS_STYLES : {}),
-              }}
-            />
-          ) : (
-            <IAIButton
-              aria-label={t('parameters.invoke')}
-              type="submit"
-              isDisabled={!isReady || isBusy}
-              onClick={handleInvoke}
-              colorScheme="accent"
-              id="invoke-button"
-              {...rest}
-              sx={{
-                w: 'full',
-                flexGrow: 1,
-                fontWeight: 700,
-                ...(isBusy ? IN_PROGRESS_STYLES : {}),
-              }}
-            >
-              Invoke
-            </IAIButton>
-          )}
-        </Tooltip>
+        {iconButton ? (
+          <IAIIconButton
+            aria-label={t('parameters.invoke')}
+            type="submit"
+            icon={<FaPlay />}
+            isDisabled={!isReady}
+            onClick={handleInvoke}
+            tooltip={<InvokeButtonTooltipContent />}
+            colorScheme="accent"
+            isLoading={isProcessing}
+            id="invoke-button"
+            {...rest}
+            sx={{
+              w: 'full',
+              flexGrow: 1,
+              ...(isProcessing ? IN_PROGRESS_STYLES : {}),
+            }}
+          />
+        ) : (
+          <IAIButton
+            tooltip={<InvokeButtonTooltipContent />}
+            aria-label={t('parameters.invoke')}
+            type="submit"
+            isDisabled={!isReady}
+            onClick={handleInvoke}
+            colorScheme="accent"
+            id="invoke-button"
+            leftIcon={isProcessing ? undefined : <FaPlay />}
+            isLoading={isProcessing}
+            loadingText={t('parameters.invoke')}
+            {...rest}
+            sx={{
+              w: 'full',
+              flexGrow: 1,
+              fontWeight: 700,
+              ...(isProcessing ? IN_PROGRESS_STYLES : {}),
+            }}
+          >
+            Invoke
+          </IAIButton>
+        )}
       </Box>
     </Box>
   );
 }
+
+export const InvokeButtonTooltipContent = memo(() => {
+  const { isReady, reasons } = useIsReadyToInvoke();
+  const { autoAddBoardId } = useAppSelector(selector);
+  const autoAddBoardName = useBoardName(autoAddBoardId);
+
+  return (
+    <Flex flexDir="column" gap={1}>
+      <Text fontWeight={600}>
+        {isReady ? 'Ready to Invoke' : 'Unable to Invoke'}
+      </Text>
+      {reasons.length > 0 && (
+        <UnorderedList>
+          {reasons.map((reason, i) => (
+            <ListItem key={`${reason}.${i}`}>
+              <Text fontWeight={400}>{reason}</Text>
+            </ListItem>
+          ))}
+        </UnorderedList>
+      )}
+      <Divider opacity={0.2} />
+      <Text fontWeight={400} fontStyle="oblique 10deg">
+        Adding images to{' '}
+        <Text as="span" fontWeight={600}>
+          {autoAddBoardName || 'Uncategorized'}
+        </Text>
+      </Text>
+    </Flex>
+  );
+});
+
+InvokeButtonTooltipContent.displayName = 'InvokeButtonTooltipContent';