download_view_image_from_url

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

No annotations exist, so the description must fully disclose behaviors. It mentions the tool saves a file and returns a success/error message, but it omits critical details like authentication requirements, file format (e.g., PNG/PDF), default filename generation, and network dependencies. This is inadequate for a tool with zero annotation coverage.

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 extremely concise: a one-sentence purpose, three lines of URL formats, and a clear Args section. Every sentence serves a purpose, with no redundancy. The structure is front-loaded with the action and then details.

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 tool with 3 parameters and an output schema, the description covers the main aspects: input formats, parameter defaults, and return value type. However, it lacks information on authentication prerequisites, file naming conventions when no filename is given, and potential errors. Still, it is largely complete given the tool's simplicity.

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?

With 0% schema description coverage, the description compensates fully by explaining each parameter: 'url' as the full Tableau URL, 'output_dir' as save location (default current directory), and 'filename' as optional custom name. This adds significant meaning beyond the raw schema.

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 tool downloads a dashboard image from a Tableau URL, using a specific verb and resource. It distinguishes from sibling tools like 'download_view_image' (which likely uses a view ID) by focusing on URL-based download. The URL format examples further clarify the resource.

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 lists supported URL formats, which helps agents identify valid inputs, but it does not specify when to use this tool versus alternatives like 'download_view_image' or 'get_view_image'. No exclusions or context on when not to use it are provided.

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