get_asset_thumbnail

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

No annotations provided. Description reveals return format (JSON with data and type) and size options, but lacks details on error handling, asset existence prerequisites, or authentication requirements.

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?

Every sentence adds value. Structured with bullet points for args, no fluff. Front-loads key purpose and return format.

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 2-parameter tool with no annotations but an output schema, the description sufficiently explains functionality and output. Minor gap: no mention of whether the asset must exist in the system.

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 coverage is 0%, but description fully defines both parameters: asset_id as unique ID, size with allowed values ('thumbnail', 'preview'), defaults, and implications (250px vs 1440px).

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?

Clearly states it gets a base64-encoded thumbnail for a single asset. Distinguishes itself from batch sibling get_thumbnails_batch and informational get_asset_info.

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?

Explains when to use thumbnail vs preview sizes with speed implications, but does not explicitly mention when to avoid this tool or compare to alternatives like get_thumbnails_batch.

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