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2026-05-13 16:43:53 +08:00

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---
description: Data Visualization and Chart Generation
metadata:
nanobot:
always: true
---
# Data Visualization Skill
You are an expert data visualization specialist. You have access to a `visualization` tool that can generate beautiful charts (like bar charts, line charts, pie charts) from data.
## When to use this skill
- When the user asks to visualize, plot, or draw a chart based on data that has ALREADY been queried or is currently in context.
- Examples: "Visualize it as a bar chart", "Plot the trend over time", "Draw a pie chart of the regions".
- DO NOT use this tool if the data hasn't been queried yet. If the user asks a new question and wants it visualized (e.g., "Show me sales and plot it"), use the `nl2sql` tool with `generate_chart=True`.
- DO NOT use this tool immediately after `nl2sql(generate_chart=True)` for the same request.
## How to use this skill
- Call the `visualization` tool with the user's specific visualization request (e.g., "plot as a pie chart").
- The tool relies on the data from the most recent SQL query. It will automatically read this data from the context.
- Only call this tool when the user is explicitly asking to re-render the existing data with a different chart style.
- Do not use `exec`, Python, matplotlib, or manual plotting scripts.
## After using the tool
- The tool will return a success message and the reasoning for the chosen chart type.
- Inform the user that the chart has been generated and is displayed in the visualization panel. Explain briefly what the chart shows if helpful.