Windows: Remove cron tool + document missing tools when on windows (#33)

The tool can be imported and run, but without the crontab binary, it's useless on windows

Author: zastrowm

README.md

@@ -72,7 +72,7 @@ Strands comes with a comprehensive set of built-in tools:
 
 - **agent_graph**: Create and manage graphs of agents
 - **calculator**: Perform mathematical operations
-- **cron**: Task scheduling with cron jobs
+- **cron**: Task scheduling with cron jobs *(not available on Windows)*
 - **current_time**: Get the current date and time
 - **editor**: File editing operations like line edits, search, and undo
 - **environment**: Manage environment variables
@@ -83,9 +83,9 @@ Strands comes with a comprehensive set of built-in tools:
 - **load_tool**: Dynamically load more tools at runtime
 - **memory**: Agent memory persistence in Amazon Bedrock Knowledge Bases
 - **nova_reels**: Create AI generated videos with Nova Reels on Amazon Bedrock
-- **python_repl**: Run Python code
+- **python_repl**: Run Python code *(not available on Windows)*
 - **retrieve**: Semantically retrieve data from Amazon Bedrock Knowledge Bases for RAG, memory, and other purposes
-- **shell**: Execute shell commands
+- **shell**: Execute shell commands *(not available on Windows)*
 - **slack**: Slack integration with real-time events, API access, and message sending
 - **speak**: Generate speech from text using macOS say command or Amazon Polly
 - **stop**: Force stop the agent event loop

src/strands_agents_builder/tools.py

@@ -49,7 +49,6 @@ def get_tools() -> dict[str, Any]:
     tools = {
         "agent_graph": agent_graph,
         "calculator": calculator,
-        "cron": cron,
         "current_time": current_time,
         "editor": editor,
         "environment": environment,
@@ -86,6 +85,7 @@ def get_tools() -> dict[str, Any]:
         )
 
         tools |= {
+            "cron": cron,
             "python_repl": python_repl,
             "shell": shell,
         }