Set composite properties for a timeline item. Args: timeline_item_id: The ID of the timeline item to modify composite_mode: Optional composite mode to set (e.g., 'Normal', 'Add', 'Multiply') opacity: Optional opacity value to set (0.0 to 1.0)
AI agents use set_timeline_item_composite to create or update resources in DaVinci Resolve MCP — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your DaVinci Resolve MCP environment.
This tool creates or modifies data (timeline item composite properties) in a reversible manner. Users can change these settings back to previous values, making it Write rather than Destructive. The severity is medium because misuse could alter video project appearance/output, but changes are easily undone and don't affect data integrity or external systems.
From the tool's definition Tool description explicitly states 'Set composite properties for a timeline item' with modifiable parameters including 'composite_mode' and 'opacity' values. The action modifies video editing timeline properties without deleting or executing arbitrary code.
Documented attack patterns abuse exactly the kind of access set_timeline_item_composite gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and DaVinci Resolve MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for set_timeline_item_composite:
{
"version": "1",
"default": "deny",
"tools": {
"set_timeline_item_composite": {
"limits": [
{
"counter": "set_timeline_item_composite_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}set_timeline_item_composite 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.
Free to start. No card required.
Set composite properties for a timeline item. Args: timeline_item_id: The ID of the timeline item to modify composite_mode: Optional composite mode to set (e.g., 'Normal', 'Add', 'Multiply') opacity: Optional opacity value to set (0.0 to 1.0). It is categorised as a Write tool in the DaVinci Resolve MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the DaVinci Resolve MCP server in PolicyLayer and add a rule for set_timeline_item_composite: 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 DaVinci Resolve MCP. Nothing to install.
set_timeline_item_composite 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 set_timeline_item_composite 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 set_timeline_item_composite. 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.
set_timeline_item_composite is provided by the DaVinci Resolve MCP server (samuelgursky/davinci-resolve-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 369 DaVinci Resolve MCP tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
369 DaVinci Resolve MCP tools catalogued and risk-classified — across an index of 42,500+ MCP servers.