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fablecut_patch_project

Apply targeted edits to a FableCut project with operations for clips, media, and project settings. Avoids full document round-trip, reducing token cost.

Instructions

Apply targeted edits to the FableCut project WITHOUT round-tripping the whole document — PREFER THIS over get+set for every edit (it is ~10-100x cheaper in tokens and merge-safe by design: it re-reads the latest document from disk, applies your ops in order, bumps revision once, saves atomically). Ops: {op:'addClip', clip:{…}} (id auto-generated if omitted) · {op:'updateClip', id, set:{…}} · {op:'removeClip', id} · {op:'addMedia', media:{…}} · {op:'removeMedia', id} · {op:'setProject', set:{name|width|height|fps|background|markers|disabledTracks}}. updateClip merge rules: top-level keys are replaced (keyframes/transitionIn/transitionOut wholesale), props merges key-by-key, and setting any key to null deletes it. All-or-nothing: an invalid op aborts the whole patch unsaved.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
opsYesEdit operations, applied in order (see tool description for shapes)
Behavior5/5

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

No annotations provided, so description carries full burden. Discloses merge-safe design, atomic save, all-or-nothing behavior, updateClip merge rules, and op details comprehensively.

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?

Single paragraph densely packs all info, but is well-structured with op list. Could be slightly more segmented, but every sentence earns its place.

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?

Lacks description of return value (e.g., success/error response), but covers behavior, parameters, and merge details thoroughly. Minor gap given no output schema.

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

Parameters5/5

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

Input schema parameter 'ops' defers to description, which provides exhaustive shapes for each op type and merge rules, adding immense value beyond the schema.

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 applies targeted edits to a FableCut project without round-tripping, distinguishing it from siblings like get+set. Uses specific verbs and resources.

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 recommends this tool over get+set due to cost and merge safety, but does not mention when to use alternatives (e.g., for complex edits needing full document).

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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