Skip to main content
Glama

set_property

Modifies a single property on a Roblox Studio instance, such as anchoring a part, changing its color, or setting its position.

Instructions

Set a single property on an instance (e.g. Workspace.Part Anchored=true, Color, Position).

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
pathYes
valueNo
propertyYes

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.1.0

TDQS

C2.9/5.0
Behavior2/5

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

No annotations are provided, so the description carries the full burden. It does not disclose permission requirements, error behavior for unknown paths/properties, or how flexible types are handled for 'value'. For a mutation tool with zero annotation coverage this is a real gap.

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?

A single efficient sentence with the action front-loaded and compact illustrative examples. No wasted words, though it is arguably too terse given the undocumented parameters.

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?

With no annotations, no output schema, and 0% parameter documentation, the description should do more. It omits value-type handling, error semantics, and path format, leaving an agent under-equipped for a mutation tool.

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% for all three parameters. The examples imply that 'path' is an instance path, 'property' a property name, and 'value' the new setting, but no format details, accepted value types, or path syntax are given to compensate for the coverage gap.

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?

States a specific verb and resource ('Set a single property on an instance') and gives concrete examples (Anchored=true, Color, Position). The word 'single' implicitly contrasts with the sibling set_properties, though it never names it explicitly.

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

Usage Guidelines3/5

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

No explicit when-to-use or when-not-to-use guidance. The 'single property' framing hints that set_properties is the multi-property alternative, but the agent must infer this rather than being told.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.