download_file

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 disclosing behavior. It mentions the download action and the ParentSquare URL restriction, but it does not disclose potential side effects like overwriting files, handling invalid URLs, or authentication requirements. This lack of depth for an operation with local disk write effects warrants a low score.

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, clear sentence that is front-loaded with the verb and resource. It contains no fluff and conveys the core purpose efficiently.

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 2-parameter download tool, the description is adequate but not complete. It lacks information about return values (e.g., success/failure or saved path), error behavior, and optional parameters. However, given the tool's simplicity, the missing pieces are not critical for basic invocation.

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 has two parameters (url and filename) with no descriptions, and the description provides zero parameter-specific details. Although the parameter names are self-explanatory, the description does not explain that filename is optional or how it behaves, leaving the agent to infer from schema structure alone.

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 a photo, video, or file to local disk from a ParentSquare URL.' It uses a specific verb and resource, and no sibling tool performs the same download function, making it easily distinguishable.

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 implies usage context (when you need to download a file from ParentSquare), but it does not explicitly compare with alternatives or state when not to use it. The sibling tools are all list/get operations, so the context is somewhat clear, but explicit guidance is missing.

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