insert_model

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

No annotations are supplied, so the description carries the full behavioral burden, and it omits key traits: whether the asset must be owned by the place owner or free, whether this is a network/asset-fetch operation that can fail, whether insertion is reversible, and what the call returns (e.g. a reference to the inserted model). Only the InsertService mechanism is disclosed.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

Two sentences, front-loaded with the core action and followed by the parameter clarifications that matter most. No filler or restated name/title, though the parameter notes could be slightly tighter.

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

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

For a 3-parameter mutation with no annotations and no output schema, the description covers the main action and two of three parameters, but leaves the return value, error conditions, and the parent parameter unaddressed. Adequate as a minimum-viable definition, not complete.

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

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

Schema description coverage is 0%, so the description must compensate. It usefully explains asset_id ('the catalog asset id') and gives a concrete format example for position ('Vector3(0,5,0)'), but the third parameter, parent, is never mentioned in the description — only its 'Workspace' default appears in the schema.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

States a specific verb and resource ('Insert a model or asset from the Roblox catalog into the place via InsertService'), which is clearly distinct from the sibling create_instance that builds empty instances. It does not explicitly name the sibling it differs from, so it stops short of a 5.

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

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

The phrase 'from the Roblox catalog' implies this is the tool for pulling existing catalog assets rather than authoring new ones, but there is no explicit when-to-use or when-not-to-use statement and no alternative tool is named. An agent must infer that create_instance is the wrong choice here.

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