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Mesteriis

Plasticity MCP

plasticity_rotate_curve_control_points

Destructive

Rotate exact Wire control handles around a specified pivot and axis to reshape curves in a single history step.

Instructions

Rotate exact current Wire control handles around an explicit world-space pivot and axis in one Plasticity history step. References must come from plasticity_list_curve_control_points at the current revision. The angle is in degrees; re-read handles and exact B-Rep geometry afterward.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
axisYes
intentNo
pointsYes
degreesYes
pivotMmYes
revisionYes

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.2.0

TDQS

A4.4/5.0
Behavior4/5

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

Annotations already flag destructiveHint=true and non-read-only, so the safety profile is covered. The description adds real behavioral value beyond that: the edit is one Plasticity history step, the pivot is world-space, and the agent should re-read handles and exact B-Rep geometry afterward. It stops short of describing failure modes or whether the operation is reversible via undo.

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?

Three tight sentences, no filler, with the action and scoping constraint front-loaded before prerequisites and post-conditions.

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 destructive, six-parameter mutation tool with no output schema and no schema descriptions, the definition covers sourcing, coordinate frame, units, and post-conditions. It omits what the return payload contains and what happens on a stale revision, but the essentials for correct invocation are present.

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?

With 0% schema description coverage the description must compensate, and it does for most parameters: degrees is in degrees, pivotMm/axis are world-space, points are Wire control handles sourced from list_curve_control_points, and revision must be current. Only the optional 'intent' parameter is left unexplained.

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?

States a specific verb (rotate) and resource (Wire control handles) with the scope qualifier 'exact current' and the transform parameters (world-space pivot and axis). It is clearly distinguishable from siblings like move_curve_control_points or scale_curve_control_points.

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?

Gives a concrete prerequisite — references must come from plasticity_list_curve_control_points at the current revision — and implicitly tells the agent to re-read handles afterward. It does not explicitly contrast against plasticity_rotate (body-level) or the other control-point tools, so no exclusions are named.

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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