AI agents use ppt_set_fill 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 modifies the visual properties of shapes in a PowerPoint presentation. Such changes are reversible (fill can be changed again or undone), so it falls under Write rather than Destructive or Execute. While the blast radius is bounded to cosmetic presentation changes, it could degrade the visual quality or intent of a presentation if misused, warranting medium severity.
From the tool's definition Tool name 'ppt_set_fill' and description 'Set the fill of a shape' indicate modification of presentation content. The verb 'set' combined with 'fill' (a visual property of shapes) shows this creates or modifies presentation data reversibly.
Documented attack patterns abuse exactly the kind of access ppt_set_fill 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_fill:
{
"version": "1",
"default": "deny",
"tools": {
"ppt_set_fill": {
"limits": [
{
"counter": "ppt_set_fill_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}ppt_set_fill 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 fill of a shape. 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_fill: 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_fill 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_fill 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_fill. 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_fill 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.