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

Annotations already establish readOnlyHint, openWorldHint, idempotentHint, and destructiveHint, so the safety profile is covered. The description adds meaningful behavioral context beyond annotations: candidates are enabled live only when under test, none is currently active, it matches ask_pipeworx exactly right now, and it is a full working router with no fallback. This transparency helps the agent calibrate expectations about variability and reliability.

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 compact and front-loaded with the most important fact: it is a beta version of ask_pipeworx with identical behavior plus experimental routing. It includes current status, usage guidance, and comparison logic without excessive padding. Minor redundancy exists in emphasizing 'full working router' after already stating identical behavior, but it earns its place by preventing misinterpretation as a stub or fallback.

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 complex universal router with no output schema, the description provides enough context: same tools, same arguments, same response shape, no active candidate, full router status, and comparison purpose. It does not enumerate the 5,798 tools or explain the response format, but it references ask_pipeworx as the source for those details, which is sufficient for a beta alias tool.

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%: all six properties are documented as aliases for the required 'question' parameter. The description adds only the generic statement that the tool takes 'same arguments' as ask_pipeworx, which is not enough to rise above the baseline. Since the schema already handles parameter meaning, a 3 is appropriate.

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 identifies this as 'Beta version of ask_pipeworx' and a 'universal router' with the same 5,798 tools, arguments, and response shape. It distinguishes itself from the stable ask_pipeworx by being the experimental edge for routing improvements. However, it never states in standalone terms what the tool actually does for an agent (e.g., answers questions by routing to tools), relying partly on the sibling's meaning.

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 explicitly says to use it 'exactly like ask_pipeworx when you want the newest routing' and explains that results are compared against the stable router. It gives clear situational context: choose this when testing the newest routing behavior, especially since no candidate is currently active. It does not explicitly state when not to use it, but the beta framing and 'experimental edge' provide adequate guidance.

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