blender_object_join

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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It reveals the intended result but does not describe that source objects are removed into the active object, which object persists, ordering semantics, prerequisites, or reversibility. For a mutating operation this is a significant gap.

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?

The description is a single six-word sentence with no filler or redundant information. It is front-loaded and efficient, precisely stating the operation in minimal words.

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 mutating tool with no annotations and no output schema, this description is too sparse. It omits the active-object behavior, what happens to the source objects, naming/transform inheritance, and any constraints on the input list, all of which are relevant for an agent to invoke the tool correctly and predict the result.

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 documents the 'names' parameter with 100% coverage, so the description adds only the implication that multiple objects are expected. It does not clarify whether the first name is the active/result object or whether any minimum count or selection state is required.

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 states a specific verb ('join'), a resource ('objects'), and the outcome ('into one'), so the core purpose is clear. However, it does not contrast this with the closely related peer blender_mesh_merge, leaving some potential ambiguity at the object vs. mesh level.

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 description gives no guidance on when to use this tool versus alternatives such as blender_object_separate, blender_mesh_merge, or boolean operations. There are no explicit when-to-use or when-not-to-use conditions, so the agent must infer all selection logic.

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