Add a marker to the current timeline. Args: frame_id: Frame number for the marker. color: Marker color (Blue, Cyan, Green, Yellow, Red, Pink, Purple, Fuchsia, Rose, Lavender, Sky, Mint, Lemon, Sand, Cocoa, Cream). name: Marker name. note: Marker note. Default: empty. duration: Duration in frames....
AI agents use timeline_add_marker 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 metadata (markers) in a DaVinci Resolve timeline, modifying the project state but in a reversible way. Markers can be deleted or edited, so this is Write rather than Destructive. The impact is limited to adding non-essential annotations to a timeline, making it low severity—misuse would merely clutter the timeline with unwanted markers that can be easily removed.
From the tool's definition The tool 'timeline_add_marker' creates a new marker object in the video timeline with configurable properties (frame_id, color, name, note, duration, custom_data). The description explicitly states 'Add a marker' which is a reversible creation operation.
Documented attack patterns abuse exactly the kind of access timeline_add_marker 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 timeline_add_marker:
{
"version": "1",
"default": "deny",
"tools": {
"timeline_add_marker": {
"limits": [
{
"counter": "timeline_add_marker_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}timeline_add_marker 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 a marker to the current timeline. Args: frame_id: Frame number for the marker. color: Marker color (Blue, Cyan, Green, Yellow, Red, Pink, Purple, Fuchsia, Rose, Lavender, Sky, Mint, Lemon, Sand, Cocoa, Cream). name: Marker name. note: Marker note. Default: empty. duration: Duration in frames. Default: 1. custom_data: Custom data string. Default: empty. 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 timeline_add_marker: 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.
timeline_add_marker 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 timeline_add_marker 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 timeline_add_marker. 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.
timeline_add_marker 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.