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AE MCP Server

AE MCP Server

by p10q
OverviewSchemaSourceRelated ServersDiscussionsAdmin
TypeScript
Local

export_frame

Extract a specific frame from an After Effects composition and save it as an image file for preview or asset use.

Instructions

Export a single frame from a composition

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": {
      "compId": "<compId>",
      "time": "<time>",
      "outputPath": "<outputPath>"
    },
    "name": "export_frame"
  }
}

Input Schema

NameRequiredDescriptionDefault
compIdYesID of the composition
timeYesTime in seconds of the frame to export
outputPathYesOutput file path for the image (PNG or JPEG)

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv1.0.0

TDQS

C2.9/5.0
Behavior2/5

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

With no annotations provided, the description carries full burden but only states the basic action. It doesn't disclose behavioral traits such as whether this is a read/write operation, file system impacts, permissions needed, or output format details beyond what's in the schema. This is inadequate for a tool that likely writes files.

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?

The description is a single, efficient sentence that directly states the tool's purpose without any wasted words. It's appropriately sized and front-loaded, making it easy to parse quickly.

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

Completeness2/5

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

Given no annotations and no output schema, the description is incomplete. It doesn't address key contextual aspects like what happens after export (e.g., file creation confirmation, error handling), making it insufficient for a tool that performs file output operations.

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?

The schema description coverage is 100%, so parameters are well-documented in the schema. The description adds no additional meaning beyond implying frame export, which is already clear from the tool name and schema. Baseline 3 is appropriate as the schema does the heavy lifting.

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?

The description clearly states the action ('Export') and resource ('a single frame from a composition'), making the purpose specific and understandable. However, it doesn't differentiate from sibling tools like 'batch_render' or 'add_to_render_queue' which might also involve exporting/render operations, so it misses full sibling distinction.

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?

The description provides no guidance on when to use this tool versus alternatives. It doesn't mention prerequisites (e.g., needing an open project or composition), exclusions, or comparisons to sibling tools like 'batch_render' for multiple frames, leaving usage context implied at best.

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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