Add Markers Batch
add_markers_batchAdds up to 200 sequence or clip markers in one validated batch, checking every time and range before writing, then reading back each created marker to fail closed on any mismatch.
Instructions
Add up to 200 sequence or clip markers in one verified CEP request (beat grids, chapters, silence reviews, client notes). Every marker is validated and range-checked before the first write; the tool reads back the marker count and each created marker's time and fails closed on any mismatch. EXPERIMENTAL QE: records an observed marker boundary for guarded Undo/Redo; crossing it is refused by default, and unreadable history records unknown protection. This boundary does not verify native marker reversal. Marker start and end storage are compared at exact integer ticks; unsupported time writes remain unverified with the created marker identity when available.
Tool call template
Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.
{
"id": 1,
"jsonrpc": "2.0",
"method": "tools/call",
"params": {
"arguments": {
"markers": "<markers>"
},
"name": "add_markers_batch"
}
}Input Schema
| Name | Required | Description | Default |
|---|---|---|---|
| markers | Yes | Markers to create, in any order; they are sorted by time before writing. | |
| node_id | No | Optional timeline clip node ID; markers are then created on that clip instead of the sequence (requires the active sequence). Premiere 25.2.3 timeline clips have no marker collection, so this refuses there and names the source time to use with add_marker_to_project_item. | |
| sequence_id | No | Sequence ID or name. Defaults to the active sequence. | |
| idempotency_key | No | Optional client-chosen key (1-128 chars of A-Z a-z 0-9 . _ : -) for this intended edit. Pass a fresh key per edit and reuse it only when retrying that same edit, for example after a client-side timeout. A repeat with the same tool, key and arguments is not run again: while the first call is running it fails with IDEMPOTENCY_IN_PROGRESS (poll get_last_operations); after it finished it returns the original outcome marked replayed. A definite failure with nothing applied (receipt outcome not_applied) may be retried with the same key. Reusing a key with different arguments fails with IDEMPOTENCY_KEY_REUSED. Scoped to this MCP session (the stdio server process, or the HTTP server process when Streamable HTTP is stateless per request) and held in memory only (200 keys, 1 hour); it does not survive a restart or reconnect. Read-only invocations are never deduplicated. | |
| allow_beyond_end | No | Allow marker times past the sequence end instead of rejecting the whole batch (default false). | |
| expected_cep_target | No | Optional reviewed CEP sequence/clip identity and exact tick ranges. Checked before every generated command; UXP refuses this CEP-only guard. | |
| expected_project_path | No | Optional absolute saved-project path. Every generated CEP command refuses before its body when the active project differs or is unsaved. UXP commands refuse this CEP-only guard; local-only tools do not inspect Premiere. Omit to keep existing behavior. | |
| skip_existing_within_frames | No | When above 0, skip a marker if an existing marker already sits within this many frames of it (default 0 = never skip). |
Output Schema
| Name | Required | Description | Default |
|---|---|---|---|
| ok | Yes | Whether the tool completed successfully. | |
| data | No | Tool-specific result data when ok is true; on failure, diagnostic detail when the tool provides it. | |
| tool | Yes | The registered MCP tool name. | |
| error | No | Failure detail when ok is false. | |
| receipt | No | Versioned common mutation receipt; success never implies rendered verification. | |
| idempotency | No | Present when idempotency_key deduplicated this call: replayed is true when the original outcome was returned instead of running again. |