diff --git a/README.md b/README.md
index 33522b4..6fc9e5c 100644
--- a/README.md
+++ b/README.md
@@ -24,7 +24,7 @@ matching comments are immediately deleted.
 
 ## Usage
 
-Create a `reaction-comments.yml` workflow file in the `.github/workflows`
+Create the `reaction-comments.yml` workflow file in the `.github/workflows`
 directory, use one of the [example workflows](#examples) to get started.
 
 ### Inputs
@@ -37,8 +37,8 @@ The action can be configured using [input parameters](https://docs.github.com/en
     secret that contains a [personal access token](#using-a-personal-access-token)
   - Optional, defaults to `${{ github.token }}`
 - **`exempt-issue-labels`**
-  - Do not process comments on issues with these labels, value must be
-    a comma separated list of labels
+  - Do not process comments on issues with any of these labels,
+    value must be a comma separated list of labels
   - Optional, defaults to `''`
 - **`issue-comment`**
   - Replace reaction comments on issues with this message,
@@ -46,8 +46,8 @@ The action can be configured using [input parameters](https://docs.github.com/en
   - Optional, defaults to `:wave: @{comment-author}, would you like to leave
     a reaction instead?`
 - **`exempt-pr-labels`**
-  - Do not process comments on pull requests with these labels, value must be
-    a comma separated list of labels
+  - Do not process comments on pull requests with any of these labels,
+    value must be a comma separated list of labels
   - Optional, defaults to `''`
 - **`pr-comment`**
   - Replace reaction comments on pull requests with this message,
@@ -58,6 +58,9 @@ The action can be configured using [input parameters](https://docs.github.com/en
   - Process comments only on issues or pull requests, value must be
     either `issues` or `prs`
   - Optional, defaults to `''`
+- **`log-output`**
+  - Log output parameters, value must be either `true` or `false`
+  - Optional, defaults to `false`
 
 ### Outputs
 
@@ -136,6 +139,7 @@ jobs:
             :wave: @{comment-author}, would you like to leave
             a reaction instead?
           process-only: ''
+          log-output: false
 ```
 
 ### Ignoring comments
diff --git a/action.yml b/action.yml
index 891ae75..f8cd7c1 100644
--- a/action.yml
+++ b/action.yml
@@ -24,6 +24,9 @@ inputs:
   process-only:
     description: 'Process comments only on issues or pull requests, value must be either `issues` or `prs`'
     default: ''
+  log-output:
+    description: 'Log output parameters, value must be either `true` or `false`'
+    default: false
 outputs:
   comments:
     description: 'Comments that have been either deleted or scheduled for removal, value is a JSON string'
diff --git a/src/index.js b/src/index.js
index d1cca48..6055710 100644
--- a/src/index.js
+++ b/src/index.js
@@ -7,7 +7,8 @@ const zip = require('adm-zip');
 
 const schema = require('./schema');
 
-const reactionRx = /^(?:\s*(?:\+1|-1|:(?:\+1|-1|thumbsup|thumbsdown|smile|tada|confused|heart|rocket|eyes):|\u{1f44d}(?:\u{1f3fb}|\u{1f3fc}|\u{1f3fd}|\u{1f3fe}|\u{1f3ff})?|\u{1f44e}(?:\u{1f3fb}|\u{1f3fc}|\u{1f3fd}|\u{1f3fe}|\u{1f3ff})?|\u{1f604}|\u{1f389}|\u{1f615}|\u{2764}\u{fe0f}|\u{1f680}|\u{1f440})\s*)+$/u;
+const reactionRx =
+  /^(?:\s*(?:\+1|-1|:(?:\+1|-1|thumbsup|thumbsdown|smile|tada|confused|heart|rocket|eyes):|\u{1f44d}(?:\u{1f3fb}|\u{1f3fc}|\u{1f3fd}|\u{1f3fe}|\u{1f3ff})?|\u{1f44e}(?:\u{1f3fb}|\u{1f3fc}|\u{1f3fd}|\u{1f3fe}|\u{1f3ff})?|\u{1f604}|\u{1f389}|\u{1f615}|\u{2764}\u{fe0f}|\u{1f680}|\u{1f440})\s*)+$/u;
 
 async function run() {
   try {
@@ -23,9 +24,16 @@ async function run() {
       output = await app.processNewComment();
     }
 
-    if (output) {
-      core.debug('Setting output (comments)');
+    core.debug('Setting output (comments)');
+    if (output && output.length) {
       core.setOutput('comments', JSON.stringify(output));
+
+      if (config['log-output']) {
+        core.info('Output (comments):');
+        core.info(JSON.stringify(output, null, 2));
+      }
+    } else {
+      core.setOutput('comments', '');
     }
   } catch (err) {
     core.setFailed(err);
diff --git a/src/schema.js b/src/schema.js
index 96929d8..8024fae 100644
--- a/src/schema.js
+++ b/src/schema.js
@@ -1,36 +1,40 @@
 const Joi = require('joi');
 
-const extendedJoi = Joi.extend({
-  type: 'stringList',
-  base: Joi.array(),
-  coerce: {
-    from: 'string',
-    method(value) {
-      value = value.trim();
-      if (value) {
-        value = value
-          .split(',')
-          .map(item => item.trim())
-          .filter(Boolean);
-      }
+const extendedJoi = Joi.extend(joi => {
+  return {
+    type: 'stringList',
+    base: joi.array(),
+    coerce: {
+      from: 'string',
+      method(value) {
+        value = value.trim();
+        if (value) {
+          value = value
+            .split(',')
+            .map(item => item.trim())
+            .filter(Boolean);
+        }
 
-      return {value};
-    }
-  }
-}).extend({
-  type: 'processOnly',
-  base: Joi.string(),
-  coerce: {
-    from: 'string',
-    method(value) {
-      value = value.trim();
-      if (['issues', 'prs'].includes(value)) {
-        value = value.slice(0, -1);
+        return {value};
       }
+    }
+  };
+}).extend(joi => {
+  return {
+    type: 'processOnly',
+    base: joi.string(),
+    coerce: {
+      from: 'string',
+      method(value) {
+        value = value.trim();
+        if (['issues', 'prs'].includes(value)) {
+          value = value.slice(0, -1);
+        }
 
-      return {value};
+        return {value};
+      }
     }
-  }
+  };
 });
 
 const schema = Joi.object({
@@ -76,7 +80,12 @@ const schema = Joi.object({
       ':wave: @{comment-author}, would you like to leave a reaction instead?'
     ),
 
-  'process-only': extendedJoi.processOnly().valid('issue', 'pr', '').default('')
+  'process-only': extendedJoi
+    .processOnly()
+    .valid('issue', 'pr', '')
+    .default(''),
+
+  'log-output': Joi.boolean().default(false)
 });
 
 module.exports = schema;