append_from_blend

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

With no annotations provided, the description must disclose behavioral traits. It only says 'Append a datablock' without explaining side effects, whether existing datablocks are overwritten, what happens on failure, or any permissions required. It does not mention the source blend file or that it loads from an external file. This is a significant gap for a mutation-like operation.

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 very short and front-loads the action, which is efficient. However, it uses only one line and under-specifies, making it more under-specified than appropriately concise. The examples are useful but the brevity sacrifices critical details. It reads more like a placeholder than a finalized description.

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?

This tool has 3 required parameters, no annotations, and no schema descriptions, so the description must carry the full burden of contextual explanation. It fails to explain the purpose of filepath, the format of the directory and filename beyond examples, or any behavioral context (e.g., does it work only with .blend files? Does it require the directory to be inside a blend? What happens if a datablock already exists?). It is far from complete for an agent to reliably invoke this tool.

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 provides zero description coverage (no types, no descriptions, just titles), so the description must compensate. It gives examples for 'directory' and 'filename' but completely omits 'filepath', which is a required parameter. The agent is left to infer what filepath means. Partial coverage, but the most ambiguous parameter is undocumented.

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 action 'Append a datablock' and distinguishes it from the sibling link_from_blend by using 'append' rather than 'link'. It also provides concrete examples for directory and filename, giving some sense of the expected input format. However, it does not explicitly mention filepath, which is a required parameter, so the overall purpose is clear but the scope is incomplete.

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 format examples but no guidance on when to use append_from_blend versus alternatives like link_from_blend. It does not state any conditions or contexts where this tool is preferred. The only hint is the word 'append' implying a copy vs. link, but that is not articulated, leaving the agent without explicit routing instructions.

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