themes_get_slide_thumbnail

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It states the tool's action but omits critical details: whether it's a read-only operation, if it requires specific permissions, what format the thumbnail is returned in (e.g., image data, URL), or any rate limits. This leaves significant gaps in understanding how the tool behaves.

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 zero wasted words. It front-loads the core purpose ('Get thumbnail') and efficiently specifies the target, making it easy to parse. Every word earns its place, achieving optimal conciseness.

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 tool with no annotations and no output schema, the description is insufficiently complete. It lacks details on return values (e.g., thumbnail format, error handling), behavioral traits (e.g., read-only status, side effects), and usage context. While concise, it fails to provide the necessary context for effective tool invocation in a complex environment.

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 100% description coverage, fully documenting both parameters ('id' and 'themeSlide'). The description adds no additional semantic context beyond what the schema provides, such as examples or format specifics. Given the high schema coverage, a baseline score of 3 is appropriate, as the description doesn't compensate but also doesn't detract.

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 ('Get thumbnail') and the target ('for a specific theme slide'), making the purpose immediately understandable. It doesn't explicitly differentiate from sibling tools like 'playlists_get_thumbnail' or 'props_get_thumbnail', but the specificity of 'theme slide' provides adequate context for its unique scope.

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 provides no guidance on when to use this tool versus alternatives, such as other thumbnail-fetching tools in the sibling list (e.g., 'playlists_get_thumbnail', 'props_get_thumbnail'). It lacks context about prerequisites, timing, or comparisons to similar tools, leaving usage decisions ambiguous.

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