download_file

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

No annotations provided, so the description is the sole source. It mentions returning content or error message, but does not disclose preconditions, path requirements (absolute/relative), file existence assumptions, or size limits. Sufficient for a simple tool but lacks depth.

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 concise with a clear structure: a summary line and Args/Returns sections. No unnecessary words. Could be slightly more polished but efficient.

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?

The tool is simple (2 params, no output schema), but the description lacks usage guidelines and behavioral details. It covers the basic what and how, but not enough context for an agent to use it correctly in all scenarios (e.g., error handling, file type restrictions).

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 properties have no descriptions (0% coverage), but the description adds short explanations ('Name of the VM', 'Path of the file'). This adds basic meaning, though it does not specify format (e.g., absolute vs relative path, file vs directory). Provides minimal but useful clarification.

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 clearly states the action ('Download'), the resource ('a file'), and the source ('from a VM'). It distinguishes from sibling tools like upload_file (opposite direction) and destroy_vm (different operation).

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?

No guidance on when to use this tool versus alternatives. Missing context such as prerequisites (e.g., VM must be running) or when other file transfer methods might be preferred.

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