get_album_thumbnails

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

No annotations provided, but the description states the tool is read-only, describes the return format (JSON with album info and thumbnails array including asset_id, base64 data, filename, date), and clarifies parameter behavior (size options with pixel dimensions, limit range). This full context compensates for the lack of annotations.

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 yet comprehensive: a clear purpose sentence, usage guidelines, read-only note, and structured parameter list with return details. No unnecessary words.

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?

Despite the tool having 53 siblings, the description sufficiently differentiates it and covers all needed context: input, output, behavior, and use case. The output schema exists, but the description still clarifies return structure, which is helpful.

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 input schema has 0% description coverage, but the description fully explains all three parameters: album_id (UUID), size (two options with default and pixel dimensions), and limit (range 1-50, default 20). This adds complete semantic meaning beyond the 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's purpose: 'Get base64-encoded thumbnails for photos in an album.' It explicitly distinguishes from the sibling tool get_thumbnails_batch, ensuring proper differentiation.

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?

Provides explicit guidance: 'Use this to generate visual HTML galleries from an existing album. For thumbnails from search results (no album), use get_thumbnails_batch instead.' This tells both when and when not to use the tool.

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