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Premiere Pro MCP Server

Premiere Pro MCP Server

Batch Add Transitions

batch_add_transitions
Destructive

Add the same video transition to every eligible cut point on a Premiere Pro video track and report per-cut results for verification.

Instructions

EXPERIMENTAL (undocumented QE DOM): Add the same video transition at each eligible cut point on a track and report per-cut readback.

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": {
      "transition_name": "<transition_name>"
    },
    "name": "batch_add_transitions"
  }
}

Input Schema

NameRequiredDescriptionDefault
track_indexNoVideo track index (0-based, default: 0)
idempotency_keyNoOptional 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.
transition_nameYesName of the transition (e.g., 'Cross Dissolve')
duration_secondsNoDuration of each transition in seconds (default: 1.0)
expected_cep_targetNoOptional reviewed CEP sequence/clip identity and exact tick ranges. Checked before every generated command; UXP refuses this CEP-only guard.
expected_project_pathNoOptional 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.

Output Schema

NameRequiredDescriptionDefault
okYesWhether the tool completed successfully.
dataNoTool-specific result data when ok is true; on failure, diagnostic detail when the tool provides it.
toolYesThe registered MCP tool name.
errorNoFailure detail when ok is false.
receiptNoVersioned common mutation receipt; success never implies rendered verification.
idempotencyNoPresent when idempotency_key deduplicated this call: replayed is true when the original outcome was returned instead of running again.

Schema Changelog

Changes observed during successful MCP inspections.

  1. Changed1 schema field changedv1.30.0
    • changedInput schema / properties / idempotency_key / description
      Previous value: -"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 one HTTP session) and held in memory only (200 keys, 1 hour); it does not survive a restart or reconnect. Read-only invocations are never deduplicated."New value: +"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."
  2. Changed2 schema fields changedv1.25.0
    • addedInput schema / properties / idempotency_key
      Added value: +{
      +  "description": "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 one HTTP session) and held in memory only (200 keys, 1 hour); it does not survive a restart or reconnect. Read-only invocations are never deduplicated.",
      +  "maxLength": 128,
      +  "minLength": 1,
      +  "pattern": "^[A-Za-z0-9._:-]+$",
      +  "type": "string"
      +}
    • addedOutput schema / properties / idempotency
      Added value: +{
      +  "additionalProperties": true,
      +  "description": "Present when idempotency_key deduplicated this call: replayed is true when the original outcome was returned instead of running again.",
      +  "type": "object"
      +}
  3. Changed3 schema fields changedv1.24.0
    • addedInput schema / properties / expected_cep_target
      Added value: +{
      +  "additionalProperties": false,
      +  "anyOf": [
      +    {
      +      "required": [
      +        "sequence_id"
      +      ]
      +    },
      +    {
      +      "required": [
      +        "source_item"
      +      ]
      +    }
      +  ],
      +  "description": "Optional reviewed CEP sequence/clip identity and exact tick ranges. Checked before every generated command; UXP refuses this CEP-only guard.",
      +  "properties": {
      +    "backend": {
      +      "const": "cep",
      +      "description": "Backend namespace for these IDs.",
      +      "type": "string"
      +    },
      +    "clip": {
      +      "additionalProperties": false,
      +      "description": "Optional exact reviewed timeline clip.",
      +      "properties": {
      +        "effect": {
      +          "additionalProperties": false,
      +          "description": "Reviewed effect and parameter identity checked before mutation.",
      +          "properties": {
      +            "display_name": {
      +              "description": "Optional exact host display name.",
      +              "maxLength": 512,
      +              "minLength": 1,
      +              "type": "string"
      +            },
      +            "match_name": {
      +              "description": "Effect match name from host inspection.",
      +              "maxLength": 512,
      +              "minLength": 1,
      +              "type": "string"
      +            },
      +            "parameter_index": {
      +              "description": "Inspected zero-based parameter index.",
      +              "maximum": 255,
      +              "minimum": 0,
      +              "type": "integer"
      +            },
      +            "parameter_name": {
      +              "description": "Exact inspected parameter name.",
      +              "maxLength": 512,
      +              "minLength": 1,
      +              "type": "string"
      +            }
      +          },
      +          "required": [
      +            "match_name",
      +            "parameter_index",
      +            "parameter_name"
      +          ],
      +          "type": "object"
      +        },
      +        "end_ticks": {
      +          "description": "Exact expected exclusive timeline end ticks.",
      +          "pattern": "^-?\\d{1,30}$",
      +          "type": "string"
      +        },
      +        "in_ticks": {
      +          "description": "Exact expected source In ticks.",
      +          "pattern": "^-?\\d{1,30}$",
      +          "type": "string"
      +        },
      +        "node_id": {
      +          "description": "Stable CEP node ID.",
      +          "maxLength": 512,
      +          "minLength": 1,
      +          "type": "string"
      +        },
      +        "out_ticks": {
      +          "description": "Exact expected exclusive source Out ticks.",
      +          "pattern": "^-?\\d{1,30}$",
      +          "type": "string"
      +        },
      +        "project_item_id": {
      +          "description": "Expected source project-item node ID.",
      +          "maxLength": 512,
      +          "minLength": 1,
      +          "type": "string"
      +        },
      +        "start_ticks": {
      +          "description": "Exact expected timeline start ticks.",
      +          "pattern": "^-?\\d{1,30}$",
      +          "type": "string"
      +        },
      +        "track_index": {
      +          "description": "Expected zero-based track index; identity still checked.",
      +          "maximum": 255,
      +          "minimum": 0,
      +          "type": "integer"
      +        },
      +        "track_type": {
      +          "description": "Expected media track group.",
      +          "enum": [
      +            "video",
      +            "audio"
      +          ],
      +          "type": "string"
      +        }
      +      },
      +      "required": [
      +        "node_id",
      +        "track_type",
      +        "track_index"
      +      ],
      +      "type": "object"
      +    },
      +    "project_document_id": {
      +      "description": "Exact Premiere project document ID observed during review.",
      +      "maxLength": 512,
      +      "minLength": 1,
      +      "type": "string"
      +    },
      +    "sequence_id": {
      +      "description": "Stable expected active sequence ID.",
      +      "maxLength": 512,
      +      "minLength": 1,
      +      "type": "string"
      +    },
      +    "source_item": {
      +      "additionalProperties": false,
      +      "description": "Reviewed source identity for a source-only operation.",
      +      "properties": {
      +        "media_path": {
      +          "description": "Optional exact source-media path.",
      +          "maxLength": 4096,
      +          "minLength": 1,
      +          "type": "string"
      +        },
      +        "node_id": {
      +          "description": "Exact project-item node ID.",
      +          "maxLength": 512,
      +          "minLength": 1,
      +          "type": "string"
      +        }
      +      },
      +      "required": [
      +        "node_id"
      +      ],
      +      "type": "object"
      +    }
      +  },
      +  "required": [
      +    "backend"
      +  ],
      +  "type": "object"
      +}
    • addedInput schema / properties / expected_project_path
      Added value: +{
      +  "description": "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.",
      +  "maxLength": 4096,
      +  "minLength": 1,
      +  "type": "string"
      +}
    • addedOutput schema / properties / receipt
      Added value: +{
      +  "additionalProperties": true,
      +  "description": "Versioned common mutation receipt; success never implies rendered verification.",
      +  "type": "object"
      +}
  4. Changed2 schema fields changedv1.18.6
    • addedInput schema / additionalProperties
      Added value: +false
    • changedOutput schema / properties / data / description
      Previous value: -"Tool-specific result data when ok is true."New value: +"Tool-specific result data when ok is true; on failure, diagnostic detail when the tool provides it."
  5. Changed2 schema fields changedv1.14.4
    • changedInput schema / $schema
      Previous value: -"http://json-schema.org/draft-07/schema#"New value: +"https://json-schema.org/draft/2020-12/schema"
    • changedOutput schema / (root)
      Previous value: -nullNew value: +{
      +  "$schema": "https://json-schema.org/draft/2020-12/schema",
      +  "additionalProperties": false,
      +  "properties": {
      +    "data": {
      +      "description": "Tool-specific result data when ok is true."
      +    },
      +    "error": {
      +      "description": "Failure detail when ok is false.",
      +      "type": "string"
      +    },
      +    "ok": {
      +      "description": "Whether the tool completed successfully.",
      +      "type": "boolean"
      +    },
      +    "tool": {
      +      "description": "The registered MCP tool name.",
      +      "minLength": 1,
      +      "type": "string"
      +    }
      +  },
      +  "required": [
      +    "ok",
      +    "tool"
      +  ],
      +  "type": "object"
      +}
  6. Changed1 schema field changedv1.4.0
    • removedInput schema / additionalProperties
      Removed value: -false
  7. First observedv1.1.1

TDQS

B3.4/5.0
Behavior3/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Adds genuinely useful context beyond annotations: it is flagged EXPERIMENTAL and built on an undocumented QE DOM, which warns of instability, and it discloses a per-cut readback. However, it does not explain what 'eligible' means, what happens at cut points that already have a transition (the destructiveHint=true risk), or how partial failures are reported, leaving the destructive profile underexplained.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

A single front-loaded sentence that leads with the EXPERIMENTAL warning before the action, with no filler. The trailing 'report per-cut readback' clause borders on redundant given an output schema exists, but it is short and informative.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness3/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Return values are covered by the output schema and parameters are fully documented in-schema, so the essentials are present. For a destructive, non-idempotent batch mutation on an undocumented API, the description omits failure/partial-success behavior and what happens to pre-existing transitions at affected cut points.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 100%, so all six parameters including idempotency_key and the CEP identity guard are documented in-schema; baseline is 3. The description only implicitly maps to transition_name and track_index ('same video transition ... on a track') and adds no semantics the schema lacks, such as how duration interacts with adjacent cuts.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

States a specific verb and resource ('Add the same video transition') plus exact scope ('at each eligible cut point on a track') and an outcome ('report per-cut readback'). The 'batch' framing and 'each eligible cut point' wording distinguish it from single-cut siblings like add_transition, though no sibling is named explicitly.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines3/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The batch context ('add the same transition at each eligible cut point') implies when to use this over a single-transition tool, but there is no explicit when/when-not guidance, no prerequisites, and no named alternative. Usage is inferable rather than stated.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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