Attach Image to Card

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

No annotations are present, so the description carries full responsibility for behavioral disclosure. It indicates a mutation (attaching) but provides no details about side effects, prerequisites, URL-fetching behavior, or error handling. This is comparable to the 'update_drive' example, which scored 2 for similar lack of transparency.

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 sentence that is concise and front-loaded with the action and resource. It contains no extraneous words and communicates 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 relatively simple tool, the description covers the essential action, and the schema fully documents parameters. However, with no annotations and no output schema, it omits operational nuances like return values or prerequisites, making it adequate but not fully comprehensive.

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 description coverage is 100%, so the baseline is 3. The description adds no extra meaning beyond the schema; it only restates the 'URL' aspect already captured in the imageUrl parameter description. No additional parameter-level insights are provided.

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 identifies the action (attach), the resource (an image or any file), the source (URL), and the target (a card on a specific board). It distinguishes this from sibling tools that retrieve, delete, or download attachments by explicitly indicating an add/attach 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?

The description implies the usage scenario—attaching a file from a URL to a card—but it does not explicitly state when to use this tool versus alternatives like get_card_attachments or delete_attachment. No exclusions or alternative tool references are provided, so guidance is only implicit.

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