Premiere Pro MCP Server

Close Source Monitor

close_source_monitor

Destructive

Closes the clip currently open in the Source Monitor, returning Premiere to the previously opened clip when one exists.

Instructions

Close the clip currently showing in the Source Monitor. Premiere then shows the previously opened clip, if any; the result names it.

Input Schema

Name	Required	Description
`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 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.
`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.

Output Schema

Name	Required	Description
`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.

Schema Changelog

Changes observed during successful MCP inspections.

Changed2 schema fields changedv1.25.0Oct 24, 2026

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"
+}

Changed3 schema fields changedv1.24.0Oct 12, 2026

addedInput schema / additionalProperties
```
Added value: +false
```

addedInput schema / properties

Added value: +{
+  "expected_cep_target": {
+    "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"
+  },
+  "expected_project_path": {
+    "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"
+}

Changed1 schema field changedv1.18.6Sep 30, 2026

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."

Changed1 schema field changedv1.14.9Sep 8, 2026
- removedInput schema / properties
```
Removed value: -{}
```

Changed2 schema fields changedv1.14.4Aug 29, 2026

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"
+}

First observedv1.1.1May 28, 2026

TDQS

B3.4/5.0

Behavior3/5

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

The description adds real behavioral context beyond annotations: the Source Monitor reveals the previously opened clip and the result names it. However, annotations already flag destructiveHint=true and it never clarifies what 'destructive' means here (no media is deleted, undo behavior, whether the clip stack becomes empty), nor mentions the idempotency/expected-state guards that the schema carries.

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

Conciseness5/5

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

Two sentences, zero filler, with the primary action front-loaded and the side effect (previous clip restored) immediately after. Nothing is repeated from the name or annotations.

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

Completeness4/5

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

For a zero-required-parameter tool with an output schema and fully documented params, the description covers purpose and post-conditions adequately. It stops short of the 'when not to use' context that would make it fully complete alongside ~20 source-monitor siblings.

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 description coverage is 100% and the parameters (idempotency_key, expected_cep_target, expected_project_path) are thoroughly self-documented. The description adds nothing about parameters, which is acceptable given the schema baseline of 3.

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 ('Close the clip currently showing in the Source Monitor'), which is unambiguous and immediately distinguishes it from timeline/edit tools. It does not explicitly differentiate from the close_all_source_clips sibling, which caps it below 5.

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

Usage Guidelines2/5

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

No statement of when to use this versus close_all_source_clips, close_sequence, or open_in_source, and no prerequisites (e.g., whether a Source Monitor must be active). The agent has to infer the workflow context from the tool name alone.

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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