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

Beyond the annotations (readOnlyHint, openWorldHint, idempotentHint, destructiveHint), the description discloses that candidate routing improvements may be enabled live, that none is currently active, and that the tool does not fall back to anything else—'this IS a full working router'. This adds meaningful behavioral context about the experimental nature without contradicting the annotations.

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?

Four sentences front-load the purpose and then add live-testing status, usage instruction, and fallback behavior. Each sentence carries distinct information, though the text is slightly longer than strictly necessary.

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, its relationship to ask_pipeworx, its experimental status, and that it is a fully working router. It references 'same response shape' rather than defining the output, which is reasonable given the sibling tool but leaves exact return semantics to look up elsewhere.

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?

The input schema already documents all six parameters at 100% coverage, including that 'question' accepts several aliases. The description only says 'same arguments' and adds no parameter-level detail, so it meets the baseline for schema-covered 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 with 'Beta version of ask_pipeworx: identical universal router (same 5,724 tools, same arguments, same response shape)', which clearly identifies the tool as an experimental routing interface. It distinguishes it from siblings like ask_pipeworx by explaining this is the live-testing edge of the stable router.

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 instruction 'Use it exactly like ask_pipeworx when you want the newest routing' gives a direct usage condition. It also implies ask_pipeworx is the stable alternative, and that choosing this tool is about evaluating candidate routing changes. Explicit when-not-to-use guidance for other siblings is not provided, but the relevant routing choice is clear.

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