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

Even though annotations already indicate read-only, idempotent, open-world behavior, the description adds valuable context: candidate routing may be active or not, the last candidate was retired, there is no fallback, and this is a fully working router rather than a stubbed beta. This prevents incorrect assumptions about reliability or availability.

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 essential beta/identical relationship and every sentence contributes important context: current state, usage, comparison to stable, and no-fallback behavior. It is slightly verbose with the parenthetical enumeration, but not padded.

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 compensates by pointing to ask_pipeworx's response shape and documenting the experimental state, current behavior, and fallback expectations. It could be more self-contained by describing the response format directly, but the sibling reference is sufficient for correct selection and invocation.

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%, so the schema already documents the required question parameter and all aliases. The description only restates that arguments are identical to ask_pipeworx and adds no extra semantic detail, so the baseline score of 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 explicitly frames the tool as a beta version of ask_pipeworx, identifies it as an identical universal router with the same 5,743 tools, same arguments, and same response shape, and distinguishes it from the stable ask_pipeworx by the experimental routing candidate behavior. This gives an agent a clear sense of what the tool is and how it differs from siblings.

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 gives an explicit usage directive: 'Use it exactly like ask_pipeworx when you want the newest routing.' It also names the stable router as the comparison point and clarifies the current no-candidate state, so an agent knows the tool currently behaves identically to ask_pipeworx. This is strong practical guidance.

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