vast42_get_icon_click_fallback_image

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

There are no annotations, so the description must fully disclose behavior. It only states that it gets a single image, but does not describe what the response contains (e.g., image binary, URL, metadata), error behavior for missing IDs, permissions needed, or whether this is a read-only operation. This is a significant gap for a tool with no structured safety metadata.

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 with no wasted words. It is front-loaded and appropriate for a simple get operation. Every word serves a purpose, making it highly concise.

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?

Even for a low-complexity get tool, the description is incomplete because there is no output schema or annotations to compensate. It fails to specify what the returned resource looks like or how the result should be handled. The lack of behavioral detail and usage guidance leaves the description insufficient for confident 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 already defines the only parameter 'id' with a description 'VAST 4.2 icon click fallback image ID'. Since schema coverage is 100%, the description does not need to repeat parameter details. It adds no extra semantic information beyond the schema, so the baseline score of 3 applies.

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 uses a specific verb ('Get') and resource ('VAST 4.2 icon click fallback image'), clearly stating it retrieves a single item. This distinguishes it from sibling list/create/update/delete operations and from the separately named 'get_icon' tool, so there is no ambiguity about purpose.

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 offers no guidance on when to use this tool versus alternatives (e.g., vast42_list_icon_click_fallback_images for fetching all, or vast42_get_icon for a different resource). It does not mention prerequisites like having an ID or that it complements other CRUD operations.

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