join_objects

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

With no annotations, the description carries the full burden of safety disclosure. It explicitly warns that the other objects are consumed and labels the operation DESTRUCTIVE, which is the most critical behavioral trait. It does not mention undoability or material/origin behavior, but the destructive warning covers the core risk.

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?

Three short sentences each carry weight: the action, the side effect, and the destructive warning. The wording is front-loaded and free of filler, with no unnecessary explanation.

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 simple two-parameter destructive operation with no output schema, the description is nearly complete. It discloses the essential risk and the schema covers parameter semantics. Minor gaps like whether the operation is undoable or how the target behaves after joining do not seriously hinder correct use.

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?

The schema already describes both parameters well, including that names are the mesh objects to merge and that target defaults to the first object. With 100% schema coverage, the description adds no parameter-level detail, so it stays at the baseline.

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?

The description uses a specific verb and resource: 'Join mesh objects into one.' The consumption warning reinforces exactly what the operation does, and no sibling tool covers the same joining behavior, so an agent can identify it unambiguously.

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?

There is no guidance on when to use this tool versus alternatives, what preconditions apply, or how to avoid accidental data loss. An agent must infer when joining is appropriate and is not directed to safer alternatives like duplicating objects first.

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