chore(ssm): update simple name description and documentation

packages/aws-cdk-lib/aws-ssm/README.md

@@ -143,3 +143,31 @@ When specifying an `allowedPattern`, the values provided as string literals
 are validated against the pattern and an exception is raised if a value
 provided does not comply.
 
+## Using Tokens in parameter name
+
+When using [CDK Tokens](https://docs.aws.amazon.com/cdk/v2/guide/tokens.html) in parameter name,
+you need to explicitly set `simpleName` property. Setting `simpleName` to incorrect boolean
+value may result in unexpected behaviours, such as getting duplicate '/' in the parameter ARN
+or missing '/' in the parameter ARN.
+
+`simpleName` is used to indicates whether the parameter name is a simple name. A parameter name
+without any '/' is considered a simple name, thus you should set `simpleName` to `true`.
+If the parameter name includes '/', set `simpleName` to `false`.
+
+```ts
+declare const func: lambda.IFunction;
+
+const simpleParameter = new ssm.StringParameter(this, 'StringParameter', {
+  // the parameter name is simple
+  parameterName: 'parameter',
+  stringValue: 'SOME_VALUE',
+  simpleName: true, // set `simpleName` to true
+});
+
+const nonSimpleParameter = new ssm.StringParameter(this, 'StringParameter', {
+  // the parameter name is not simple
+  parameterName: `/${func.functionName}/my/app/param`,
+  stringValue: 'SOME_VALUE',
+  simpleName: false, // set `simpleName` to false
+});
+```

packages/aws-cdk-lib/aws-ssm/lib/parameter.ts

@@ -99,8 +99,10 @@ export interface ParameterOptions {
   readonly parameterName?: string;
 
   /**
-   * Indicates if the parameter name is a simple name (i.e. does not include "/"
-   * separators).
+   * Indicates whether the parameter name is a simple name. A parameter name
+   * without any "/" is considered a simple name. If the parameter name includes
+   * "/", setting simpleName to true might cause unintended issues, such
+   * as duplicate "/" in the resulting ARN.
    *
    * This is required only if `parameterName` is a token, which means we
    * are unable to detect if the name is simple or "path-like" for the purpose
@@ -337,8 +339,10 @@ export interface CommonStringParameterAttributes {
   readonly parameterName: string;
 
   /**
-   * Indicates if the parameter name is a simple name (i.e. does not include "/"
-   * separators).
+   * Indicates whether the parameter name is a simple name. A parameter name
+   * without any "/" is considered a simple name. If the parameter name includes
+   * "/", setting simpleName to true might cause unintended issues, such
+   * as duplicate "/" in the resulting ARN.
    *
    * This is required only if `parameterName` is a token, which means we
    * are unable to detect if the name is simple or "path-like" for the purpose