cloud_storage_download_file

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

With no annotations provided, the description carries the full burden of behavioral disclosure. While it mentions the action ('download') and success return value, it doesn't describe error handling, authentication requirements, rate limits, file size constraints, or what happens if the file already exists at the destination path. For a mutation tool with zero annotation coverage, this leaves significant behavioral gaps.

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 well-structured with clear sections (Args, Returns) and uses minimal sentences. Each sentence serves a purpose: stating the tool's function, documenting parameters, and specifying the return value. However, the parameter documentation is misleading given the actual schema.

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 file download tool with no annotations, no output schema, and a complex nested input schema (1 parameter with nested objects at 0% coverage), the description is incomplete. It fails to explain the actual 'request' parameter structure, doesn't describe error cases or side effects, and provides parameter documentation that contradicts the actual schema.

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 description lists three parameters (object_name, file_path, bucket_name) with brief explanations, but the input schema shows only one parameter ('request') with 0% description coverage. This creates a direct contradiction - the description documents parameters that don't match the schema structure, providing misleading information rather than adding value beyond what the schema provides.

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 specific action ('Download a file') and resource ('from cloud storage'), distinguishing it from sibling tools like upload_file, delete_object, and list_objects. It uses precise verb+resource language that leaves no ambiguity about the tool's function.

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 provides no guidance on when to use this tool versus alternatives like cloud_storage_list_objects (to check what's available) or cloud_storage_upload_file (for the opposite operation). It doesn't mention prerequisites, error conditions, or contextual constraints for choosing this download operation.

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