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Execute ExtendScript

ps_execute_script
Destructive

Execute custom ExtendScript commands in Photoshop to perform tasks beyond standard tool capabilities. Solves the need for advanced or unsupported operations.

Instructions

Runs arbitrary ExtendScript code directly in Photoshop. This is the escape hatch for anything the other tools cannot do. The script string is passed to Photoshop as-is. Use with care — there are no guardrails. Returns whatever the script evaluates to.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
scriptYesRaw ExtendScript code to execute in Photoshop
Behavior5/5

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

Description adds significant context beyond annotations: 'no guardrails', script passed as-is, return value mentioned. Consistent with destructiveHint and openWorldHint.

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?

Extremely concise: three sentences, front-loaded with purpose, includes warning and return info. No wasted words.

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

Completeness5/5

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

Given simple schema (one string, no enums, no output schema, no nested objects), description fully covers purpose, behavior, and risks. Sufficient for agent.

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

Parameters4/5

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

Schema covers parameter with decent description; description adds key detail that script is passed as-is, enhancing understanding of execution model.

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

Purpose5/5

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

Clearly states it runs arbitrary ExtendScript code, explicitly positions it as an escape hatch for tasks other tools cannot do, effectively distinguishing it from sibling tools.

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

Usage Guidelines4/5

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

Explicitly warns about no guardrails and using with care, implying use when other tools fail. Lacks explicit when-not-to-use or specific alternatives, but context is clear.

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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