download_image_block

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

No annotations are provided, so the description carries the full burden. It discloses that Notion-hosted URLs are short-lived and re-fetched at call time, a key behavioral trait. However, it does not mention if downloading modifies the block or any permission requirements, which would be beneficial.

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 concise, with a clear front-loaded purpose statement followed by structured Args. Every sentence adds value without unnecessary fluff.

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?

Given the presence of an output schema (context signal), the description does not need to explain return values. It covers important aspects like supported image types and URL refreshing. However, it omits potential error conditions or prerequisites (e.g., block must be an image block), which could improve completeness.

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 0%, so the description must compensate. It provides brief but meaningful descriptions for both parameters: 'The image block to download from' and 'Local path to write the image to', adding context beyond the bare schema types. However, it lacks details like path format or overwrite behavior.

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), the resource (image file from an image block), and the destination (local path). It also specifies it works for all three image source types, distinguishing it from siblings like replace_image_block or upload_image_as_block.

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 for any image block but does not provide explicit guidance on when to use this tool vs. alternatives like replace_image_block or upload_image_as_block. No when-not or alternative scenarios are mentioned.

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