diff --git a/src/compiler/binder.ts b/src/compiler/binder.ts
index d1c9c196f252e..59b1eb19d7323 100644
--- a/src/compiler/binder.ts
+++ b/src/compiler/binder.ts
@@ -200,9 +200,9 @@ import {
     isOptionalChain,
     isOptionalChainRoot,
     isOutermostOptionalChain,
-    isParameterDeclaration,
     isParameterPropertyDeclaration,
     isParenthesizedExpression,
+    isPartOfParameterDeclaration,
     isPartOfTypeQuery,
     isPrefixUnaryExpression,
     isPrivateIdentifier,
@@ -3647,7 +3647,7 @@ function createBinder(): (file: SourceFile, options: CompilerOptions) => void {
             else if (isBlockOrCatchScoped(node)) {
                 bindBlockScopedDeclaration(node, SymbolFlags.BlockScopedVariable, SymbolFlags.BlockScopedVariableExcludes);
             }
-            else if (isParameterDeclaration(node)) {
+            else if (isPartOfParameterDeclaration(node)) {
                 // It is safe to walk up parent chain to find whether the node is a destructuring parameter declaration
                 // because its parent chain has already been set up, since parents are set before descending into children.
                 //
diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index cc5d7b0cdd664..d4565607249fd 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -674,10 +674,10 @@ import {
     isOptionalTypeNode,
     isOutermostOptionalChain,
     isParameter,
-    isParameterDeclaration,
     isParameterPropertyDeclaration,
     isParenthesizedExpression,
     isParenthesizedTypeNode,
+    isPartOfParameterDeclaration,
     isPartOfTypeNode,
     isPartOfTypeQuery,
     isPlainJsFile,
@@ -8233,7 +8233,7 @@ export function createTypeChecker(host: TypeCheckerHost): TypeChecker {
                     sym.flags & SymbolFlags.FunctionScopedVariable
                     && sym.valueDeclaration
                 ) {
-                    if (isParameterDeclaration(sym.valueDeclaration)) {
+                    if (isPartOfParameterDeclaration(sym.valueDeclaration)) {
                         return { introducesError, node: attachSymbolToLeftmostIdentifier(node) as T };
                     }
                 }
@@ -8994,7 +8994,7 @@ export function createTypeChecker(host: TypeCheckerHost): TypeChecker {
             }
 
             function includePrivateSymbol(symbol: Symbol) {
-                if (some(symbol.declarations, isParameterDeclaration)) return;
+                if (some(symbol.declarations, isPartOfParameterDeclaration)) return;
                 Debug.assertIsDefined(deferredPrivatesStack[deferredPrivatesStack.length - 1]);
                 getUnusedName(unescapeLeadingUnderscores(symbol.escapedName), symbol); // Call to cache unique name for symbol
                 // Blanket moving (import) aliases into the root private context should work, since imports are not valid within namespaces
@@ -10686,7 +10686,7 @@ export function createTypeChecker(host: TypeCheckerHost): TypeChecker {
         }
         const pattern = declaration.parent;
         // Relax null check on ambient destructuring parameters, since the parameters have no implementation and are just documentation
-        if (strictNullChecks && declaration.flags & NodeFlags.Ambient && isParameterDeclaration(declaration)) {
+        if (strictNullChecks && declaration.flags & NodeFlags.Ambient && isPartOfParameterDeclaration(declaration)) {
             parentType = getNonNullableType(parentType);
         }
         // Filter `undefined` from the type we check against if the parent has an initializer and that initializer is not possibly `undefined`
@@ -42464,7 +42464,7 @@ export function createTypeChecker(host: TypeCheckerHost): TypeChecker {
         for (const node of potentialUnusedRenamedBindingElementsInTypes) {
             if (!getSymbolOfDeclaration(node)?.isReferenced) {
                 const wrappingDeclaration = walkUpBindingElementsAndPatterns(node);
-                Debug.assert(isParameterDeclaration(wrappingDeclaration), "Only parameter declaration should be checked here");
+                Debug.assert(isPartOfParameterDeclaration(wrappingDeclaration), "Only parameter declaration should be checked here");
                 const diagnostic = createDiagnosticForNode(node.name, Diagnostics._0_is_an_unused_renaming_of_1_Did_you_intend_to_use_it_as_a_type_annotation, declarationNameToString(node.name), declarationNameToString(node.propertyName));
                 if (!wrappingDeclaration.type) {
                     // entire parameter does not have type annotation, suggest adding an annotation
@@ -42746,7 +42746,7 @@ export function createTypeChecker(host: TypeCheckerHost): TypeChecker {
         //      }
 
         // skip block-scoped variables and parameters
-        if ((getCombinedNodeFlagsCached(node) & NodeFlags.BlockScoped) !== 0 || isParameterDeclaration(node)) {
+        if ((getCombinedNodeFlagsCached(node) & NodeFlags.BlockScoped) !== 0 || isPartOfParameterDeclaration(node)) {
             return;
         }
 
@@ -42818,7 +42818,7 @@ export function createTypeChecker(host: TypeCheckerHost): TypeChecker {
             if (
                 node.propertyName &&
                 isIdentifier(node.name) &&
-                isParameterDeclaration(node) &&
+                isPartOfParameterDeclaration(node) &&
                 nodeIsMissing((getContainingFunction(node) as FunctionLikeDeclaration).body)
             ) {
                 // type F = ({a: string}) => void;
@@ -42864,7 +42864,7 @@ export function createTypeChecker(host: TypeCheckerHost): TypeChecker {
             forEach(node.name.elements, checkSourceElement);
         }
         // For a parameter declaration with an initializer, error and exit if the containing function doesn't have a body
-        if (node.initializer && isParameterDeclaration(node) && nodeIsMissing((getContainingFunction(node) as FunctionLikeDeclaration).body)) {
+        if (node.initializer && isPartOfParameterDeclaration(node) && nodeIsMissing((getContainingFunction(node) as FunctionLikeDeclaration).body)) {
             error(node, Diagnostics.A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation);
             return;
         }
diff --git a/src/compiler/utilities.ts b/src/compiler/utilities.ts
index 3759d3fd21325..85d06e1fe2a3a 100644
--- a/src/compiler/utilities.ts
+++ b/src/compiler/utilities.ts
@@ -5340,10 +5340,6 @@ export function isPushOrUnshiftIdentifier(node: Identifier) {
     return node.escapedText === "push" || node.escapedText === "unshift";
 }
 
-// TODO(jakebailey): this function should not be named this. While it does technically
-// return true if the argument is a ParameterDeclaration, it also returns true for nodes
-// that are children of ParameterDeclarations inside binding elements.
-// Probably, this should be called `rootDeclarationIsParameter`.
 /**
  * This function returns true if the this node's root declaration is a parameter.
  * For example, passing a `ParameterDeclaration` will return true, as will passing a
@@ -5353,7 +5349,7 @@ export function isPushOrUnshiftIdentifier(node: Identifier) {
  *
  * @internal
  */
-export function isParameterDeclaration(node: Declaration): boolean {
+export function isPartOfParameterDeclaration(node: Declaration): boolean {
     const root = getRootDeclaration(node);
     return root.kind === SyntaxKind.Parameter;
 }
@@ -11239,7 +11235,7 @@ export function createNameResolver({
                             lastLocation === (location as BindingElement).name && isBindingPattern(lastLocation)
                         )
                     ) {
-                        if (isParameterDeclaration(location as BindingElement) && !associatedDeclarationForContainingInitializerOrBindingName) {
+                        if (isPartOfParameterDeclaration(location as BindingElement) && !associatedDeclarationForContainingInitializerOrBindingName) {
                             associatedDeclarationForContainingInitializerOrBindingName = location as BindingElement;
                         }
                     }
diff --git a/src/services/inlayHints.ts b/src/services/inlayHints.ts
index 5fdc91e2dab3c..ed084912c6863 100644
--- a/src/services/inlayHints.ts
+++ b/src/services/inlayHints.ts
@@ -70,8 +70,8 @@ import {
     isObjectLiteralExpression,
     isOptionalTypeNode,
     isParameter,
-    isParameterDeclaration,
     isParenthesizedTypeNode,
+    isPartOfParameterDeclaration,
     isPrefixUnaryExpression,
     isPropertyAccessExpression,
     isPropertyDeclaration,
@@ -899,7 +899,7 @@ export function provideInlayHints(context: InlayHintsContext): InlayHint[] {
     }
 
     function isHintableDeclaration(node: VariableDeclaration | ParameterDeclaration) {
-        if ((isParameterDeclaration(node) || isVariableDeclaration(node) && isVarConst(node)) && node.initializer) {
+        if ((isPartOfParameterDeclaration(node) || isVariableDeclaration(node) && isVarConst(node)) && node.initializer) {
             const initializer = skipParentheses(node.initializer);
             return !(isHintableLiteral(initializer) || isNewExpression(initializer) || isObjectLiteralExpression(initializer) || isAssertionExpression(initializer));
         }