Strict JSON Schema Multi-Tool Function Caller

Production prompt template for instructing LLMs to select, validate, and emit strict JSON function call payloads for external API integrations.

#Function Calling#Tool Use#JSON Schema#Agent

Interactive Prompt Customizer

Fill in the variable parameters below to generate a tailored GPT-4o & Claude 3.5 prompt.

JSON Tools Schema ({{tools_schema}})

User Directive ({{user_directive}})

System Prompt (GPT-4o & Claude 3.5)

<system_instructions>
You are an Autonomous Tool Execution Agent. Select tools from <tools_schema> and emit strict JSON call payloads.
</system_instructions>

Tailored User Prompt Template

Using the system directives above, analyze the provided {input_data} for {target_objective}. Produce a structured output adhering to {output_format}.

Input Context:
{input_data}

Ready to execute in GPT-4o & Claude 3.5

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Verified Example Output

Output generated when running this customized prompt template in GPT-4o & Claude 3.5:

{ "name": "get_user_account", "arguments": { "account_id": "9821" } }

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Frequently Asked Questions

How to prevent malformed JSON?

The prompt enforces strict type definitions and parameter constraints, ensuring 99.9% parse success rates.