diff --git a/README.md b/README.md
index cc8b0441..4d59d255 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# Ruby worker for Temporal
+# Ruby SDK for Temporal
 
 [![Coverage Status](https://coveralls.io/repos/github/coinbase/temporal-ruby/badge.svg?branch=master)](https://coveralls.io/github/coinbase/temporal-ruby?branch=master)
 
@@ -6,7 +6,7 @@
 
 A pure Ruby library for defining and running Temporal workflows and activities.
 
-To find more about Temporal please visit <https://temporal.io/>.
+To find more about Temporal itself please visit <https://temporal.io/>.
 
 
 ## Getting Started
diff --git a/lib/temporal/client.rb b/lib/temporal/client.rb
index d2380855..b4d6d0b2 100644
--- a/lib/temporal/client.rb
+++ b/lib/temporal/client.rb
@@ -13,6 +13,23 @@ def initialize(config)
       @config = config
     end
 
+    # Start a workflow
+    #
+    # @param workflow [Temporal::Workflow, String] workflow class or name. When a workflow class
+    #   is passed, its config (namespace, task_queue, timeouts, etc) will be used
+    # @param input [any] arguments to be passed to workflow's #execute method
+    # @param args [Hash] keyword arguments to be passed to workflow's #execute method
+    # @param options [Hash, nil] optional overrides
+    # @option options [String] :workflow_id
+    # @option options [Symbol] :workflow_id_reuse_policy check Temporal::Connection::GRPC::WORKFLOW_ID_REUSE_POLICY
+    # @option options [String] :name workflow name
+    # @option options [String] :namespace
+    # @option options [String] :task_queue
+    # @option options [Hash] :retry_policy check Temporal::RetryPolicy for available options
+    # @option options [Hash] :timeouts check Temporal::Configuration::DEFAULT_TIMEOUTS
+    # @option options [Hash] :headers
+    #
+    # @return [String] workflow's run ID
     def start_workflow(workflow, *input, **args)
       options = args.delete(:options) || {}
       input << args unless args.empty?
@@ -37,6 +54,24 @@ def start_workflow(workflow, *input, **args)
       response.run_id
     end
 
+    # Schedule a workflow for a periodic cron-like execution
+    #
+    # @param workflow [Temporal::Workflow, String] workflow class or name. When a workflow class
+    #   is passed, its config (namespace, task_queue, timeouts, etc) will be used
+    # @param cron_schedule [String] a cron-style schedule string
+    # @param input [any] arguments to be passed to workflow's #execute method
+    # @param args [Hash] keyword arguments to be pass to workflow's #execute method
+    # @param options [Hash, nil] optional overrides
+    # @option options [String] :workflow_id
+    # @option options [Symbol] :workflow_id_reuse_policy check Temporal::Connection::GRPC::WORKFLOW_ID_REUSE_POLICY
+    # @option options [String] :name workflow name
+    # @option options [String] :namespace
+    # @option options [String] :task_queue
+    # @option options [Hash] :retry_policy check Temporal::RetryPolicy for available options
+    # @option options [Hash] :timeouts check Temporal::Configuration::DEFAULT_TIMEOUTS
+    # @option options [Hash] :headers
+    #
+    # @return [String] workflow's run ID
     def schedule_workflow(workflow, cron_schedule, *input, **args)
       options = args.delete(:options) || {}
       input << args unless args.empty?
@@ -64,10 +99,23 @@ def schedule_workflow(workflow, cron_schedule, *input, **args)
       response.run_id
     end
 
+    # Register a new Temporal namespace
+    #
+    # @param name [String] name of the new namespace
+    # @param description [String] optional namespace description
     def register_namespace(name, description = nil)
       connection.register_namespace(name: name, description: description)
     end
 
+    # Send a signal to a running workflow
+    #
+    # @param workflow [Temporal::Workflow, nil] workflow class or nil
+    # @param signal [String] name of the signal to send
+    # @param workflow_id [String]
+    # @param run_id [String]
+    # @param input [String, Array, nil] optional arguments for the signal
+    # @param namespace [String, nil] if nil, choose the one declared on the workflow class or the
+    #   global default
     def signal_workflow(workflow, signal, workflow_id, run_id, input = nil, namespace: nil)
       execution_options = ExecutionOptions.new(workflow, {}, config.default_execution_options)
 
@@ -80,15 +128,22 @@ def signal_workflow(workflow, signal, workflow_id, run_id, input = nil, namespac
       )
     end
 
-    # Long polls for a workflow to be completed and returns whatever the execute function
-    # returned.  This function times out after 30 seconds and throws Temporal::TimeoutError,
+    # Long polls for a workflow to be completed and returns workflow's return value.
+    #
+    # @note This function times out after 30 seconds and throws Temporal::TimeoutError,
     # not to be confused with Temporal::WorkflowTimedOut which reports that the workflow
     # itself timed out.
-    # run_id of nil: await the entire workflow completion.  This can span multiple runs
-    # in the case where the workflow uses continue-as-new.
-    # timeout: seconds to wait for the result.  This cannot be longer than 30 seconds because
-    # that is the maximum the server supports.
-    # namespace: if nil, choose the one declared on the Workflow, or the global default
+    #
+    # @param workflow [Temporal::Workflow, nil] workflow class or nil
+    # @param workflow_id [String]
+    # @param run_id [String, nil] awaits the entire workflow completion when nil. This can span
+    #   multiple runs in the case where the workflow uses continue-as-new.
+    # @param timeout [Integer, nil] seconds to wait for the result. This cannot be longer than 30
+    #   seconds because that is the maximum the server supports.
+    # @param namespace [String, nil] if nil, choose the one declared on the workflow class or the
+    #   global default
+    #
+    # @return workflow's return value
     def await_workflow_result(workflow, workflow_id:, run_id: nil, timeout: nil, namespace: nil)
       options = namespace ? {namespace: namespace} : {}
       execution_options = ExecutionOptions.new(workflow, options, config.default_execution_options)
@@ -135,6 +190,21 @@ def await_workflow_result(workflow, workflow_id:, run_id: nil, timeout: nil, nam
       end
     end
 
+    # Reset a workflow
+    #
+    # @note More on resetting a workflow here —
+    #   https://docs.temporal.io/docs/system-tools/tctl/#restart-reset-workflow
+    #
+    # @param namespace [String]
+    # @param workflow_id [String]
+    # @param run_id [String]
+    # @param strategy [Symbol, nil] one of the Temporal::ResetStrategy values or `nil` when
+    #   passing a workflow_task_id
+    # @param workflow_task_id [Integer, nil] A specific event ID to reset to. The event has to
+    #   be of a type WorkflowTaskCompleted, WorkflowTaskFailed or WorkflowTaskTimedOut
+    # @param reason [String] a reset reason to be recorded in workflow's history for reference
+    #
+    # @return [String] run_id of the new workflow execution
     def reset_workflow(namespace, workflow_id, run_id, strategy: nil, workflow_task_id: nil, reason: 'manual reset')
       # Pick default strategy for backwards-compatibility
       strategy ||= :last_workflow_task unless workflow_task_id
@@ -157,6 +227,14 @@ def reset_workflow(namespace, workflow_id, run_id, strategy: nil, workflow_task_
       response.run_id
     end
 
+    # Terminate a running workflow
+    #
+    # @param workflow_id [String]
+    # @param namespace [String, nil] use a default namespace when `nil`
+    # @param run_id [String, nil]
+    # @param reason [String, nil] a termination reason to be recorded in workflow's history
+    #   for reference
+    # @param details [String, Array, nil] optional details to be stored in history
     def terminate_workflow(workflow_id, namespace: nil, run_id: nil, reason: nil, details: nil)
       namespace ||= Temporal.configuration.namespace
 
@@ -169,6 +247,13 @@ def terminate_workflow(workflow_id, namespace: nil, run_id: nil, reason: nil, de
       )
     end
 
+    # Fetch workflow's execution info
+    #
+    # @param namespace [String]
+    # @param workflow_id [String]
+    # @param run_id [String]
+    #
+    # @return [Temporal::Workflow::ExecutionInfo] an object containing workflow status and other info
     def fetch_workflow_execution_info(namespace, workflow_id, run_id)
       response = connection.describe_workflow_execution(
         namespace: namespace,
@@ -179,6 +264,11 @@ def fetch_workflow_execution_info(namespace, workflow_id, run_id)
       Workflow::ExecutionInfo.generate_from(response.workflow_execution_info)
     end
 
+    # Manually complete an activity
+    #
+    # @param async_token [String] an encoded Temporal::Activity::AsyncToken
+    # @param result [String, Array, nil] activity's return value to be stored in history and
+    #   passed back to a workflow
     def complete_activity(async_token, result = nil)
       details = Activity::AsyncToken.decode(async_token)
 
@@ -191,6 +281,11 @@ def complete_activity(async_token, result = nil)
       )
     end
 
+    # Manually fail an activity
+    #
+    # @param async_token [String] an encoded Temporal::Activity::AsyncToken
+    # @param exception [Exception] activity's failure exception to be stored in history and
+    #   raised in a workflow
     def fail_activity(async_token, exception)
       details = Activity::AsyncToken.decode(async_token)
 
@@ -203,6 +298,13 @@ def fail_activity(async_token, exception)
       )
     end
 
+    # Fetch workflow's execution history
+    #
+    # @param namespace [String]
+    # @param workflow_id [String]
+    # @param run_id [String]
+    #
+    # @return [Temporal::Workflow::History] workflow's execution history
     def get_workflow_history(namespace:, workflow_id:, run_id:)
       history_response = connection.get_workflow_execution_history(
         namespace: namespace,
diff --git a/temporal.gemspec b/temporal.gemspec
index 59ef1192..c8589c9e 100644
--- a/temporal.gemspec
+++ b/temporal.gemspec
@@ -21,4 +21,5 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency 'rspec'
   spec.add_development_dependency 'fabrication'
   spec.add_development_dependency 'grpc-tools'
+  spec.add_development_dependency 'yard'
 end