xkcd_latest

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

With no annotations, the description only says 'Fetch the latest comic', which lacks details on side effects, authentication needs, rate limits, or return format. Minimal behavioral disclosure.

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?

Single sentence, no wasted words, and directly conveys the tool's purpose. Perfectly concise for its simplicity.

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 no output schema and no annotations, the description provides basic purpose but omits what the tool returns (e.g., comic data, image URL). Slightly incomplete for an agent to fully anticipate behavior.

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?

No parameters exist, and schema coverage is 100%. The description adds no parameter info, but baseline for zero parameters is 4. It effectively states the tool's action without redundant details.

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 the tool fetches the latest comic from xkcd.com. The verb 'Fetch' and resource 'latest comic' are specific, and it is distinguished from siblings like xkcd_get (specific comic) and xkcd_random.

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?

No guidance on when to use this tool vs. alternatives like xkcd_random or xkcd_get. The description does not mention when not to use or provide any contextual hints for selection.

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