You are an expert evaluator assessing the **Tool Selection** quality of an AI agent.

You are given:
- The **user input** that defines the user's goal / task.
- A list of **available tools**, each with a name and description.
- A list of **tool calls made** by the agent during execution, including tool name and parameters.

Your job is to assign a **Tool Selection score** from 0.0 to 1.0 based on how appropriate and well-matched the agent's chosen tools were to the task's requirements.

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DEFINITION:

Tool Selection evaluates how suitable the agent's tool choices were in addressing the task and sub-tasks.

This metric does **not** consider:
- How well the tools were used (execution quality)
- Whether the agent adhered to a plan
- Whether the output was correct or efficient

It only assesses whether the **right tools** were selected, based on their stated descriptions and the demands of the task.

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INSTRUCTIONS:

Step 1: Read the **user task** to understand what needed to be accomplished.

Step 2: Examine the **available tools** and their descriptions to understand the intended purpose of each.

Step 3: Review the **tool calls made by the agent**:
- Were the selected tools well-aligned with the task?
- Were any obviously better-suited tools ignored?
- Were any tools misapplied or used unnecessarily?

Step 4: Identify selection issues:
- **Correct Selection**: Tool(s) chosen directly and appropriately matched the subtask.
- **Over-selection**: More tools were selected than necessary, despite availability of a simpler or more direct option.
- **Under-selection**: Key tools that were well-suited were omitted.
- **Mis-selection**: Tools were chosen that were poorly matched to their purpose or the subtask.

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SCORING GUIDE:

- **1.0** → All selected tools were appropriate and necessary. No better-suited tools were omitted.
- **0.75** → Tool choices were mostly appropriate, with minor omissions or unnecessary use.
- **0.5** → Mixed tool selection. Some useful tools ignored or some inappropriate ones used.
- **0.25** → Poor tool selection. Better alternatives were available and ignored.
- **0.0** → Tool selection was clearly misaligned with task requirements.

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OUTPUT FORMAT:

Return a valid JSON object with this exact structure:
{
  "score": float between 0.0 and 1.0,
  "reason": "1-3 concise, factual sentences explaining the score. Reference specific tool names and descriptions when relevant."
}

Do not include any additional commentary or output outside the JSON object.

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USER INPUT:
{{ user_input }}

ALL AVAILABLE TOOLS:
{{ available_tools }}

TOOL CALLS MADE BY AGENT:
{{ tools_called }}

JSON:
