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Ase Set Slice Pivot

ase_set_slice_pivot

Set a slice's pivot point relative to its origin in Aseprite sprite sheets, enabling precise rotation and scaling anchors.

Instructions

Set a slice's pivot point (relative to the slice origin).

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
xYes
yYes
nameYes
sprite_pathYes

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv1.0.0

TDQS

C2.8/5.0
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 it only says 'set' without disclosing side effects, prerequisites, coordinate units, behavior when the slice doesn't exist, or whether the change is persisted. It adds the origin-relative detail but omits most behavioral context an agent would need for a mutation tool.

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 sentence with no filler, and the core action is front-loaded before the parenthetical coordinate detail. Every word earns its place.

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?

Despite the tool's low structural complexity and presence of an output schema, the description is incomplete for reliable invocation: parameter meanings are mostly missing, no error or prerequisite behavior is noted, and no distinction is made from the slice-center sibling. An agent can guess the operation but not confidently supply correct values.

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

Parameters2/5

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

Schema description coverage is 0%, and all four required parameters are undocumented. The description only hints that x and y are measured relative to the slice origin; it does not explain sprite_path, name, pixel units, or how coordinates are interpreted beyond that hint.

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 states a clear verb and resource: 'Set a slice's pivot point.' It also adds the coordinate detail 'relative to the slice origin,' which helps define the operation's scope. It does not explicitly differentiate from the sibling ase_set_slice_center, though 'pivot point' is reasonably specific.

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 guidance is given about when to use this tool versus alternatives such as ase_set_slice_center or ase_create_slice. The description only rephrases the operation itself and leaves tool selection completely to the agent.

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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