Using multiple tools

Key Concepts: Integrating Custom Tools with Claude

Tool Implementation and Setup

• Goal: To enable Claude to perform specific, custom actions (e. g. , calculating future dates, setting reminders).
• Tool Components: Each tool requires a defined schema (the description of the tool) and an implementation function (the actual code that runs the tool).
• New Tools Added:
• add duration to date time: Calculates a new date/time based on a specified duration.
• set reminder: Simulates setting a reminder by printing a confirmation statement.

Integration Steps

• Step 1: Inform Claude of Tools: The schemas for all available tools must be passed into the run conversation function. This makes Claude aware of the tools' existence and capabilities.
• Step 2: Implement Tool Execution: The run tool function must be updated to act as a router.
• It receives the tool name and tool input from Claude.
• It uses conditional logic (e. g. , if/elif) to identify the requested tool.
• It calls the appropriate underlying function (e. g. , if name is "add duration to date time," call that function).
• It returns the result of the function call back to the conversation.

Workflow and Scalability

• Multi-Step Tool Use: Complex requests often require multiple tool calls in sequence.
• Example: A request to "set a reminder 177 days after January 1, 2050" requires Claude to first use add duration to date time to find the correct date, and then use set reminder with that calculated date.
• Conversation Flow: The process involves a loop:
• User Message → 2. Assistant Tool Use Block → 3. Tool Results Response → 4. Final Assistant Response.
• Adding Future Tools: The process is highly modular. To add a new tool, simply update the run tool function, add the new tool schema, and write the implementation function.

Takeaways

• Tools require two components: a defined schema (description) and an implementation function (the code).
• Integration involves passing tool schemas to the conversation function and using a router function to execute the appropriate tool based on input.
• Complex requests often necessitate multi-step tool use, where one tool's output feeds into the next.
• The conversation flow follows a loop: User Message → Assistant Tool Use Block → Tool Results Response → Final Assistant Response.
• The system is modular, allowing new tools to be added simply by updating the router function and providing the new schema and implementation.