AI agents use add_table 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.
The tool appears to create or insert a table into a PowerPoint presentation, which is a reversible modification of presentation content (Write category). Severity is medium because while it modifies data, the effects are limited to presentation structure and can be undone. Confidence is 0.85 (not higher) because the tool description is empty, requiring inference from naming convention and sibling context.
From the tool's definition Tool name 'add_table' combined with sibling tools that 'add_image', 'add_chart', 'add_textbox' all performing content creation operations. Server description states 'Create and edit PowerPoint presentations'.
Documented attack patterns abuse exactly the kind of access add_table 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_table:
{
"version": "1",
"default": "deny",
"tools": {
"add_table": {
"limits": [
{
"counter": "add_table_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}add_table 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_table. 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_table: 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_table 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_table 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_table. 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_table 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.