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

Beyond the read-only, open-world, idempotent annotations, the description discloses that routing improvements may be live during tests, that no candidate is currently active (so it matches ask_pipeworx exactly), and that it has no fallback — it is a fully working router. This is valuable behavioral context for an agent deciding whether to rely on it.

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 front-loaded with the tool's identity and contains no filler; each sentence contributes state, usage, or relationship to the stable router. The retired-date detail is slightly more than necessary but supports the 'currently matches ask_pipeworx exactly' claim rather than being redundant.

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 one-required-parameter router with rich annotations, the description covers identity, current behavior, fallback behavior, and comparison purpose. It does not enumerate the 5,884 tools or explain the response format explicitly, but it defers to ask_pipeworx's response shape, which is acceptable given the sibling context.

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 coverage is 100%; the schema already documents the question parameter and its five aliases with clear descriptions. The description adds only 'same arguments' as a pointer to ask_pipeworx, which is useful but not necessary for understanding the parameters.

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 opens by identifying the tool as the beta version of ask_pipeworx and frames it as an identical universal router with the same 5,884 tools, arguments, and response shape, while flagging candidate routing improvements. This gives a concrete verb-resource pairing and differentiates it from the stable ask_pipeworx sibling by its experimental routing edge.

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?

It explicitly says to use it exactly like ask_pipeworx when the newest routing is wanted and explains that results are compared against the stable router to decide merges. It does not explicitly state when not to use it, but the beta/experimental framing and the mention of the stable router supply adequate selection context.

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