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

Annotations already declare readOnlyHint=true and idempotentHint=true. The description adds value by specifying the return structure (markdown, tip, what-to-watch, FAQs, canonical URL), which is not covered by annotations. No contradictions.

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?

Two sentences with no wasted words. The most important action ('Fetch') is front-loaded. Every sentence provides essential information.

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 tool has one parameter, an output schema, and annotations, the description fully explains what the tool does, what inputs are acceptable, and what outputs to expect. No missing aspects for a fetch operation.

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 single parameter 'id' has 100% schema coverage. The description goes beyond the schema by clarifying that 'id' can be a slug from search, an /ask path, or a full URL, which adds significant meaning for correct usage.

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 uses the specific verb 'Fetch' and clearly identifies the resource as 'full published answer for a Pinnacle Ask result'. It enumerates the returned components, which helps differentiate from sibling tools like 'search' which returns slugs.

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 explains that the 'id' parameter accepts a slug from 'search', an /ask path, or a full URL, giving clear context for how to use the tool. However, it does not explicitly state when to prefer this tool over siblings like 'browse' or 'topic', leaving a minor gap.

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