AI agents use ppt_lock_aspect_ratio 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 aspect ratio lock state of a shape, which is a reversible Write operation. It changes presentation data (shape properties) but the modification can be undone. It does not retrieve data (Read), execute external commands (Execute), permanently delete content (Destructive), or involve financial transactions (Financial).
From the tool's definition Tool description states it can 'Lock or unlock the aspect ratio of a shape', which modifies the properties of presentation objects. This is a reversible modification of shape attributes within PowerPoint.
Documented attack patterns abuse exactly the kind of access ppt_lock_aspect_ratio 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_lock_aspect_ratio:
{
"version": "1",
"default": "deny",
"tools": {
"ppt_lock_aspect_ratio": {
"limits": [
{
"counter": "ppt_lock_aspect_ratio_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}ppt_lock_aspect_ratio 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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Lock or unlock the aspect ratio 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_lock_aspect_ratio: 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_lock_aspect_ratio 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_lock_aspect_ratio 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_lock_aspect_ratio. 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_lock_aspect_ratio 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.
Free to start. No card required.
156 Ppt tools catalogued and risk-classified — across an index of 42,500+ MCP servers.