AI agents use ppt_set_slide_size to create or update resources in Ppt — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Ppt environment.
This tool creates a reversible modification to presentation metadata (slide dimensions). It does not delete data, execute code, or trigger financial transactions. The blast radius is medium because resizing slides could disrupt layout of existing content, but the action is reversible via undo or setting a different size.
From the tool's definition ppt_set_slide_size performs a modification operation ('Set the slide size') on presentation data. The tool name contains 'set', indicating a write/update action that modifies the active presentation's properties.
Documented attack patterns abuse exactly the kind of access ppt_set_slide_size gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Ppt, and nothing reaches the server without passing your rules. This is the rule we recommend for ppt_set_slide_size:
{
"version": "1",
"default": "deny",
"tools": {
"ppt_set_slide_size": {
"limits": [
{
"counter": "ppt_set_slide_size_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}ppt_set_slide_size 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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Set the slide size of the active presentation. It is categorised as a Write tool in the Ppt MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Ppt MCP server in PolicyLayer and add a rule for ppt_set_slide_size: 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 Ppt. Nothing to install.
ppt_set_slide_size 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 ppt_set_slide_size 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 ppt_set_slide_size. 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.
ppt_set_slide_size is provided by the Ppt MCP server (ykuwai/ppt-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 156 Ppt tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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156 Ppt tools catalogued and risk-classified — across an index of 42,500+ MCP servers.