AI agents use add_chart to create or update resources in Powerpoint — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Powerpoint environment.
add_chart creates new content in a PowerPoint presentation, which is a reversible modification (Write category). Severity is medium because misuse could clutter presentations or waste resources, but changes are easily undone. Confidence is moderate-to-high due to empty description, but sibling tools and server purpose strongly indicate write capability.
From the tool's definition Tool name 'add_chart' with sibling tools 'add_image', 'add_shape', 'add_table', 'add_textbox' that clearly create/modify presentation content. Server purpose is 'Create and edit PowerPoint presentations'.
Documented attack patterns abuse exactly the kind of access add_chart gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Powerpoint, and nothing reaches the server without passing your rules. This is the rule we recommend for add_chart:
{
"version": "1",
"default": "deny",
"tools": {
"add_chart": {
"limits": [
{
"counter": "add_chart_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}add_chart stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
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add_chart. It is categorised as a Write tool in the Powerpoint MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Powerpoint MCP server in PolicyLayer and add a rule for add_chart: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Powerpoint. Nothing to install.
add_chart is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the add_chart rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for add_chart. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
add_chart is provided by the Powerpoint MCP server (juanocampo400/powerpoint-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Powerpoint, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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17 Powerpoint tools catalogued and risk-classified — across an index of 43,000+ MCP servers.