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Glama

material_delete

Destructive

Delete a material from a Marmoset Toolbag 5 scene; affected objects fall back to the default material.

Instructions

Delete a material; its objects fall back to the default material.

Input Schema

NameRequiredDescriptionDefault
nameYes

Output Schema

NameRequiredDescriptionDefault

No arguments

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.1.0

TDQS

B3.3/5.0
Behavior4/5

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

Annotations already declare destructiveHint=true and readOnlyHint=false, so the description's real value is the disclosed side effect: objects using the material fall back to the default material. That is meaningful consequence information beyond structured fields. It stops short of stating irreversibility or whether the deletion is blocked when the material is in use.

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?

One sentence, front-loaded with the action, with the side-effect consequence appended. No wasted text.

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

Completeness3/5

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

An output schema exists, so return values need not be explained, and the destructive annotation is complemented by the fallback disclosure. However, for a destructive one-parameter tool with zero schema coverage, the definition should at least identify what 'name' refers to.

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 the single parameter 'name' is undocumented in both schema and description. The description does not clarify whether 'name' is a material name, path, or ID, leaving the one required parameter ambiguous.

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: 'Delete a material'. The resource distinguishes it from object_delete and the other material_* siblings, though it does not explicitly name an alternative tool. Clear and unambiguous purpose.

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 on when to delete versus reassign via material_assign, nor any prerequisites or warnings. The usage context is only implied by the verb 'Delete'.

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