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

The description goes beyond the annotations by disclosing the beta/experimental nature, the live candidate-routing mechanism, the current inactive status with a specific retirement date, and the fact that behavior may match ask_pipeworx exactly. It also explicitly states that this is a complete working router rather than a partial fallback. This is rich behavioral context that annotations alone do not provide.

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 somewhat lengthy but well-structured: it opens with the core identity, then states current status, usage guidance, and fallback clarity. Each sentence contributes useful information, though the repeated emphasis that it currently matches ask_pipeworx exactly and that it should be used like ask_pipeworx is slightly 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?

The description covers what the tool is, current operational status, when to use it, and that it is a fully functional router. It relies on ask_pipeworx for concrete argument and response-shape details, which is reasonable given the sibling context and high schema coverage. It does not describe the actual return payload, but the statement 'same response shape' provides a sufficient pointer.

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 parameters and aliases. The description adds only the vague phrase 'same arguments' and refers the agent back to ask_pipeworx for details. This is acceptable but does not meaningfully enrich parameter understanding beyond the schema.

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 identifies the tool as 'Beta version of ask_pipeworx: identical universal router' with the same 5,738 tools, arguments, and response shape. It distinguishes itself from ask_pipeworx by emphasizing the experimental routing edge and states that it currently matches ask_pipeworx exactly. This gives an agent a precise understanding of what the tool is and how it differs from its stable counterpart.

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?

Explicit guidance is provided: 'Use it exactly like ask_pipeworx when you want the newest routing.' It also clarifies that results are compared against the stable router, and that the tool 'falls back to nothing' because it is a full working router. This tells the agent when to prefer this tool over the stable alternative and removes ambiguity about fallback behavior.

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