diff --git a/actions-expressions/package.json b/actions-expressions/package.json
index 52f6bd9..57376e9 100755
--- a/actions-expressions/package.json
+++ b/actions-expressions/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@github/actions-expressions",
-  "version": "0.1.91",
+  "version": "0.1.92",
   "license": "MIT",
   "type": "module",
   "source": "./src/index.ts",
diff --git a/actions-languageserver/package.json b/actions-languageserver/package.json
index 2f373be..d594df9 100644
--- a/actions-languageserver/package.json
+++ b/actions-languageserver/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@github/actions-languageserver",
-  "version": "0.1.91",
+  "version": "0.1.92",
   "description": "Language server for GitHub Actions",
   "license": "MIT",
   "type": "module",
@@ -38,8 +38,8 @@
     "watch": "tsc --build tsconfig.build.json --watch"
   },
   "dependencies": {
-    "@github/actions-languageservice": "^0.1.91",
-    "@github/actions-workflow-parser": "^0.1.91",
+    "@github/actions-languageservice": "^0.1.92",
+    "@github/actions-workflow-parser": "^0.1.92",
     "@octokit/rest": "^19.0.5",
     "vscode-languageserver": "^8.0.2",
     "vscode-languageserver-textdocument": "^1.0.7",
diff --git a/actions-languageserver/src/connection.ts b/actions-languageserver/src/connection.ts
index af1bcad..d1650bc 100644
--- a/actions-languageserver/src/connection.ts
+++ b/actions-languageserver/src/connection.ts
@@ -23,6 +23,7 @@ import {TTLCache} from "./utils/cache";
 import {valueProviders} from "./value-providers";
 import {getActionInputs} from "./value-providers/action-inputs";
 import {Commands} from "./commands";
+import {descriptionProvider} from "./description-provider";
 
 export function initConnection(connection: Connection) {
   const documents: TextDocuments<TextDocument> = new TextDocuments(TextDocument);
@@ -120,7 +121,9 @@ export function initConnection(connection: Connection) {
   });
 
   connection.onHover(async ({position, textDocument}: HoverParams): Promise<Hover | null> => {
-    return hover(documents.get(textDocument.uri)!, position);
+    return hover(documents.get(textDocument.uri)!, position, {
+      descriptionProvider: descriptionProvider(sessionToken, cache)
+    });
   });
 
   connection.onRequest("workspace/executeCommand", (params: ExecuteCommandParams) => {
diff --git a/actions-languageserver/src/description-provider.ts b/actions-languageserver/src/description-provider.ts
new file mode 100644
index 0000000..bd724ed
--- /dev/null
+++ b/actions-languageserver/src/description-provider.ts
@@ -0,0 +1,26 @@
+import {DescriptionProvider} from "@github/actions-languageservice/hover";
+import {Octokit} from "@octokit/rest";
+import {TTLCache} from "./utils/cache";
+import {getActionInputDescription} from "./description-providers/action-input";
+
+export function descriptionProvider(sessionToken: string | undefined, cache: TTLCache): DescriptionProvider {
+  const octokit =
+    sessionToken &&
+    new Octokit({
+      auth: sessionToken
+    });
+
+  const getDescription: DescriptionProvider["getDescription"] = async (context, token, path) => {
+    if (!octokit) {
+      return undefined;
+    }
+    const parent = path[path.length - 1];
+    if (context.step && parent.definition?.key === "step-with") {
+      return await getActionInputDescription(octokit, cache, context.step, token);
+    }
+  };
+
+  return {
+    getDescription
+  };
+}
diff --git a/actions-languageserver/src/description-providers/action-input.ts b/actions-languageserver/src/description-providers/action-input.ts
new file mode 100644
index 0000000..a6b1385
--- /dev/null
+++ b/actions-languageserver/src/description-providers/action-input.ts
@@ -0,0 +1,53 @@
+import {parseActionReference} from "@github/actions-languageservice/action";
+import {isString} from "@github/actions-workflow-parser";
+import {isActionStep} from "@github/actions-workflow-parser/model/type-guards";
+import {Step} from "@github/actions-workflow-parser/model/workflow-template";
+import {TemplateToken} from "@github/actions-workflow-parser/templates/tokens/template-token";
+import {Octokit} from "@octokit/rest";
+import {fetchActionMetadata} from "../utils/action-metadata";
+import {TTLCache} from "../utils/cache";
+
+export async function getActionInputDescription(
+  client: Octokit,
+  cache: TTLCache,
+  step: Step,
+  token: TemplateToken
+): Promise<string | undefined> {
+  if (!isActionStep(step)) {
+    return undefined;
+  }
+  const action = parseActionReference(step.uses.value);
+  if (!action) {
+    return undefined;
+  }
+
+  const inputName = isString(token) && token.value;
+  if (!inputName) {
+    return undefined;
+  }
+
+  const metadata = await fetchActionMetadata(client, cache, action);
+  if (!metadata?.inputs) {
+    return undefined;
+  }
+
+  const input = metadata.inputs[inputName];
+  if (!input) {
+    return undefined;
+  }
+
+  let description = input.description;
+
+  const deprecated = input.deprecationMessage !== undefined;
+
+  if (deprecated) {
+    // Validation will include the deprecation message, so don't duplicate it here
+    description += `\n\n**Deprecated**`;
+  }
+
+  if (input.required) {
+    description += "\n\n**Required**";
+  }
+
+  return description;
+}
diff --git a/actions-languageservice/package.json b/actions-languageservice/package.json
index 3278d3b..fa3e3c6 100644
--- a/actions-languageservice/package.json
+++ b/actions-languageservice/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@github/actions-languageservice",
-  "version": "0.1.91",
+  "version": "0.1.92",
   "description": "Language service for GitHub Actions",
   "license": "MIT",
   "type": "module",
@@ -38,8 +38,8 @@
     "watch": "tsc --build tsconfig.build.json --watch"
   },
   "dependencies": {
-    "@github/actions-expressions": "^0.1.91",
-    "@github/actions-workflow-parser": "^0.1.91",
+    "@github/actions-expressions": "^0.1.92",
+    "@github/actions-workflow-parser": "^0.1.92",
     "vscode-languageserver-textdocument": "^1.0.7",
     "vscode-languageserver-types": "^3.17.2",
     "yaml": "^2.1.1"
diff --git a/actions-languageservice/src/hover.test.ts b/actions-languageservice/src/hover.test.ts
index 35dc317..6a3e35d 100644
--- a/actions-languageservice/src/hover.test.ts
+++ b/actions-languageservice/src/hover.test.ts
@@ -1,6 +1,25 @@
-import {hover} from "./hover";
+import {isString} from "@github/actions-workflow-parser/.";
+import {StringToken} from "@github/actions-workflow-parser/templates/tokens/string-token";
+import {DescriptionProvider, hover, HoverConfig} from "./hover";
 import {getPositionFromCursor} from "./test-utils/cursor-position";
 
+function testHoverConfig(tokenValue: string, tokenKey: string, description?: string) {
+  return {
+    descriptionProvider: {
+      getDescription: async (_, token, __) => {
+        if (!isString(token)) {
+          throw new Error("Test provider only supports string tokens");
+        }
+
+        expect((token as StringToken).value).toEqual(tokenValue);
+        expect(token.definition!.key).toEqual(tokenKey);
+
+        return description;
+      }
+    } satisfies DescriptionProvider
+  } satisfies HoverConfig
+}
+
 describe("hover", () => {
   it("on a key", async () => {
     const input = `o|n: push
@@ -111,3 +130,37 @@ jobs:
     expect(result?.contents).toEqual("Invalid cron expression");
   });
 });
+
+describe("hover with description provider", () => {
+  it("uses the description provider", async () => {
+    const input = `
+on: push
+jobs:
+  build:
+    runs-on: [self-hosted]
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          ref|: main
+`;
+
+    const result = await hover(...getPositionFromCursor(input), testHoverConfig("ref", "string", "The branch, tag or SHA to checkout."));
+    expect(result).not.toBeUndefined();
+    expect(result?.contents).toEqual("The branch, tag or SHA to checkout.");
+  });
+
+  it("falls back to the token description", async () => {
+    const input = `
+on: push
+jobs:
+  build:
+    runs-on: [self-hosted]
+    steps:
+      - uses|: actions/checkout@v2
+`;
+
+    const result = await hover(...getPositionFromCursor(input), testHoverConfig("uses", "non-empty-string", undefined));
+    expect(result).not.toBeUndefined();
+    expect(result?.contents).toEqual("Selects an action to run as part of a step in your job. An action is a reusable unit of code. You can use an action defined in the same repository as the workflow, a public repository, or in a published Docker container image.");
+  });
+});
diff --git a/actions-languageservice/src/hover.ts b/actions-languageservice/src/hover.ts
index 8ad7107..354af03 100644
--- a/actions-languageservice/src/hover.ts
+++ b/actions-languageservice/src/hover.ts
@@ -1,4 +1,5 @@
-import {parseWorkflow} from "@github/actions-workflow-parser";
+import {convertWorkflowTemplate, parseWorkflow, ParseWorkflowResult} from "@github/actions-workflow-parser";
+import {ErrorPolicy} from "@github/actions-workflow-parser/model/convert";
 import {TemplateToken} from "@github/actions-workflow-parser/templates/tokens/template-token";
 import {TokenResult} from "./utils/find-token";
 import {File} from "@github/actions-workflow-parser/workflows/file";
@@ -6,14 +7,23 @@ import {isString} from "@github/actions-workflow-parser/templates/tokens/type-gu
 import {StringToken} from "@github/actions-workflow-parser/templates/tokens/string-token";
 import {Position, TextDocument} from "vscode-languageserver-textdocument";
 import {Hover} from "vscode-languageserver-types";
+import {getWorkflowContext, WorkflowContext} from "./context/workflow-context";
 import {info} from "./log";
 import {nullTrace} from "./nulltrace";
 import {findToken} from "./utils/find-token";
 import {mapRange} from "./utils/range";
 import {getSentence} from "@github/actions-workflow-parser/model/converter/cron";
 
+export type DescriptionProvider = {
+  getDescription(context: WorkflowContext, token: TemplateToken, path: TemplateToken[]): Promise<string | undefined>;
+};
+
+export type HoverConfig = {
+  descriptionProvider?: DescriptionProvider;
+};
+
 // Render value description and Context when hovering over a key in a MappingToken
-export async function hover(document: TextDocument, position: Position): Promise<Hover | null> {
+export async function hover(document: TextDocument, position: Position, config?: HoverConfig): Promise<Hover | null> {
   const file: File = {
     name: document.uri,
     content: document.getText()
@@ -21,18 +31,13 @@ export async function hover(document: TextDocument, position: Position): Promise
   const result = parseWorkflow(file.name, [file], nullTrace);
 
   const tokenResult = findToken(position, result.value);
-
-  if (result.value) {
-    return getHover(tokenResult);
-  }
-  return null;
-}
-
-function getHover(tokenResult: TokenResult): Hover | null {
   const token = tokenResult.token;
-  if (!token) {
+  if (!token?.definition) {
     return null;
   }
+
+  info(`Calculating hover for token with definition ${token.definition.key}`);
+
   if (tokenResult.parent && isCronMappingValue(tokenResult)) {
     const tokenValue = (token as StringToken).value
     let description = getSentence(tokenValue);
@@ -50,27 +55,38 @@ function getHover(tokenResult: TokenResult): Hover | null {
       range: mapRange(token.range)
     } as Hover;
   }
-  if (token.definition) {
-    info(`Calculating hover for token with definition ${token.definition.key}`);
 
-    let description = "";
-    if (token.description) {
-      description = token.description;
-    }
+  let description = await getDescription(document, config, result, token, tokenResult.path);
 
-    if (token.definition.evaluatorContext.length > 0) {
-      // Only add padding if there is a description
-      description += `${description.length > 0 ? `\n\n` : ""}**Context:** ${token.definition.evaluatorContext.join(
-        ", "
-      )}`;
-    }
-
-    return {
-      contents: description,
-      range: mapRange(token.range)
-    } as Hover;
+  if (token.definition.evaluatorContext.length > 0) {
+    // Only add padding if there is a description
+    description += `${description.length > 0 ? `\n\n` : ""}**Context:** ${token.definition.evaluatorContext.join(
+      ", "
+    )}`;
   }
-  return null;
+
+  return {
+    contents: description,
+    range: mapRange(token.range)
+  } satisfies Hover;
+}
+
+async function getDescription(
+  document: TextDocument,
+  config: HoverConfig | undefined,
+  result: ParseWorkflowResult | undefined,
+  token: TemplateToken,
+  path: TemplateToken[]
+) {
+  const defaultDescription = token.description || "";
+  if (!result?.value || !config?.descriptionProvider) {
+    return defaultDescription;
+  }
+
+  const template = convertWorkflowTemplate(result.context, result.value, ErrorPolicy.TryConversion);
+  const workflowContext = getWorkflowContext(document.uri, template, path);
+  const description = await config.descriptionProvider.getDescription(workflowContext, token, path);
+  return description || defaultDescription;
 }
 
 function isCronMappingValue(tokenResult: TokenResult): boolean {
diff --git a/actions-languageservice/src/value-providers/config.ts b/actions-languageservice/src/value-providers/config.ts
index 916a569..40b88df 100644
--- a/actions-languageservice/src/value-providers/config.ts
+++ b/actions-languageservice/src/value-providers/config.ts
@@ -4,7 +4,7 @@ export interface Value {
   /** Label of this value */
   label: string;
 
-  /** Optional description to show when auto-completing or hovering */
+  /** Optional description to show when auto-completing */
   description?: string;
 
   /** Whether this value is deprecated */
diff --git a/actions-workflow-parser/package.json b/actions-workflow-parser/package.json
index 9302656..4a525b8 100644
--- a/actions-workflow-parser/package.json
+++ b/actions-workflow-parser/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@github/actions-workflow-parser",
-  "version": "0.1.91",
+  "version": "0.1.92",
   "license": "MIT",
   "type": "module",
   "source": "./src/index.ts",
@@ -40,7 +40,7 @@
     "watch": "tsc --build tsconfig.build.json --watch"
   },
   "dependencies": {
-    "@github/actions-expressions": "^0.1.91",
+    "@github/actions-expressions": "^0.1.92",
     "yaml": "^2.0.0-8"
   },
   "engines": {
diff --git a/browser-playground/package.json b/browser-playground/package.json
index d2d32bb..d5656ad 100644
--- a/browser-playground/package.json
+++ b/browser-playground/package.json
@@ -1,12 +1,12 @@
 {
   "name": "browser-playground",
-  "version": "0.1.91",
+  "version": "0.1.92",
   "description": "",
   "private": true,
   "main": "index.js",
   "type": "module",
   "dependencies": {
-    "@github/actions-languageserver": "^0.1.91",
+    "@github/actions-languageserver": "^0.1.92",
     "monaco-editor-webpack-plugin": "^7.0.1",
     "monaco-editor-workers": "^0.34.2",
     "monaco-languageclient": "^4.0.3",
diff --git a/lerna.json b/lerna.json
index 39120ec..99258c8 100644
--- a/lerna.json
+++ b/lerna.json
@@ -1,5 +1,5 @@
 {
   "$schema": "node_modules/lerna/schemas/lerna-schema.json",
   "useWorkspaces": true,
-  "version": "0.1.91"
+  "version": "0.1.92"
 }
diff --git a/package-lock.json b/package-lock.json
index 90f53ee..ad4580d 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -21,7 +21,7 @@
     },
     "actions-expressions": {
       "name": "@github/actions-expressions",
-      "version": "0.1.91",
+      "version": "0.1.92",
       "license": "MIT",
       "devDependencies": {
         "@types/jest": "^29.0.3",
@@ -37,11 +37,11 @@
     },
     "actions-languageserver": {
       "name": "@github/actions-languageserver",
-      "version": "0.1.91",
+      "version": "0.1.92",
       "license": "MIT",
       "dependencies": {
-        "@github/actions-languageservice": "^0.1.91",
-        "@github/actions-workflow-parser": "^0.1.91",
+        "@github/actions-languageservice": "^0.1.92",
+        "@github/actions-workflow-parser": "^0.1.92",
         "@octokit/rest": "^19.0.5",
         "vscode-languageserver": "^8.0.2",
         "vscode-languageserver-textdocument": "^1.0.7",
@@ -62,11 +62,11 @@
     },
     "actions-languageservice": {
       "name": "@github/actions-languageservice",
-      "version": "0.1.91",
+      "version": "0.1.92",
       "license": "MIT",
       "dependencies": {
-        "@github/actions-expressions": "^0.1.91",
-        "@github/actions-workflow-parser": "^0.1.91",
+        "@github/actions-expressions": "^0.1.92",
+        "@github/actions-workflow-parser": "^0.1.92",
         "vscode-languageserver-textdocument": "^1.0.7",
         "vscode-languageserver-types": "^3.17.2",
         "yaml": "^2.1.1"
@@ -85,10 +85,10 @@
     },
     "actions-workflow-parser": {
       "name": "@github/actions-workflow-parser",
-      "version": "0.1.91",
+      "version": "0.1.92",
       "license": "MIT",
       "dependencies": {
-        "@github/actions-expressions": "^0.1.91",
+        "@github/actions-expressions": "^0.1.92",
         "yaml": "^2.0.0-8"
       },
       "devDependencies": {
@@ -107,10 +107,10 @@
       }
     },
     "browser-playground": {
-      "version": "0.1.91",
+      "version": "0.1.92",
       "license": "MIT",
       "dependencies": {
-        "@github/actions-languageserver": "^0.1.91",
+        "@github/actions-languageserver": "^0.1.92",
         "monaco-editor-webpack-plugin": "^7.0.1",
         "monaco-editor-workers": "^0.34.2",
         "monaco-languageclient": "^4.0.3",
@@ -14439,8 +14439,8 @@
     "@github/actions-languageserver": {
       "version": "file:actions-languageserver",
       "requires": {
-        "@github/actions-languageservice": "^0.1.91",
-        "@github/actions-workflow-parser": "^0.1.91",
+        "@github/actions-languageservice": "^0.1.92",
+        "@github/actions-workflow-parser": "^0.1.92",
         "@octokit/rest": "^19.0.5",
         "@types/jest": "^29.0.3",
         "jest": "^29.0.3",
@@ -14457,8 +14457,8 @@
     "@github/actions-languageservice": {
       "version": "file:actions-languageservice",
       "requires": {
-        "@github/actions-expressions": "^0.1.91",
-        "@github/actions-workflow-parser": "^0.1.91",
+        "@github/actions-expressions": "^0.1.92",
+        "@github/actions-workflow-parser": "^0.1.92",
         "@types/jest": "^29.0.3",
         "jest": "^29.0.3",
         "prettier": "^2.7.1",
@@ -14473,7 +14473,7 @@
     "@github/actions-workflow-parser": {
       "version": "file:actions-workflow-parser",
       "requires": {
-        "@github/actions-expressions": "^0.1.91",
+        "@github/actions-expressions": "^0.1.92",
         "@types/jest": "^29.0.3",
         "@typescript-eslint/eslint-plugin": "^5.40.0",
         "@typescript-eslint/parser": "^5.40.0",
@@ -17400,7 +17400,7 @@
     "browser-playground": {
       "version": "file:browser-playground",
       "requires": {
-        "@github/actions-languageserver": "^0.1.91",
+        "@github/actions-languageserver": "^0.1.92",
         "css-loader": "^6.7.2",
         "monaco-editor-webpack-plugin": "^7.0.1",
         "monaco-editor-workers": "^0.34.2",