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

The description adds transparency by disclosing it is a beta/experimental edge, that behavior currently matches ask_pipeworx exactly, that it falls back to nothing (it's a full working router), and that no candidate is active as of a specific date. This goes beyond the annotations by revealing the dynamic experimental nature and the comparison workflow. Annotations already provide read-only/idempotent safety, so the bar is lower, but this is still genuinely informative.

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 moderately concise and front-loads the beta status, then explains the current equivalence to ask_pipeworx and the experimental purpose. It's a bit verbose with the parenthetical details, but every sentence earns its place by explaining the routing comparison and fallback behavior. Reasonably structured for a tool with a complex relationship to its sibling.

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 a simple single-required-parameter input, the description is complete enough: it clarifies what the tool does, how it relates to ask_pipeworx, and what to expect behaviorally. It could mention the response shape more explicitly, but it already says 'same response shape' as ask_pipeworx. The dynamic 'candidate improvements' context is useful for understanding potential behavior changes.

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 description coverage is 100%, and the description mentions 'same arguments' refer to ask_pipeworx. The schema itself documents all aliases. However, the description doesn't add extra semantic detail about the question parameter beyond what the schema states, so it meets the baseline of 3 for high schema coverage.

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 that this is a beta variant of ask_pipeworx, a universal router with the same tools, arguments, and response shape. It distinguishes itself from ask_pipeworx by emphasizing the experimental routing improvements. However, it doesn't fully explain what the universal router does beyond routing questions, relying on the sibling name for that context.

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 explicit guidance: use it like ask_pipeworx when you want the newest routing, and notes that results are compared against the stable router. It also clarifies that no candidate is active right now, so behavior matches ask_pipeworx exactly. This gives an agent clear context on when to choose it, though it doesn't explicitly say 'when not to use it' beyond the beta aspect.

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