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

Beyond the readOnly/openWorld/idempotent annotations, it discloses that candidate routing improvements are enabled live under test, that results are compared against the stable router, that there is no fallback ('Falls back to nothing'), and that it is currently identical to ask_pipeworx because the last candidate was retired. No contradiction with 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?

The description is front-loaded with the core purpose and includes a direct usage instruction early. It is somewhat dense, with transient specifics like the exact retirement date and the 'same 5,798 tools' count, but each detail supports the beta-context and current-behavior message.

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?

Given the annotations cover safety/idempotence and the schema covers the single required question parameter, the description provides sufficient calling context: what variant to use, when it matches stable, and that it is a fully working router. The lack of an output schema is partially mitigated by the statement that the response shape matches ask_pipeworx, though that shape is not described.

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%: every parameter is documented as an alias for the required question string. The description adds only 'same arguments as ask_pipeworx,' which does not provide material semantics beyond the schema, so the baseline 3 applies.

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 the tool as a beta variant of ask_pipeworx that is an 'identical universal router' with the same tools, arguments, and response shape, and it clearly distinguishes this version from the stable sibling by its experimental routing. It is clear about being the newest-routing variant, though it relies on the reader already understanding what ask_pipeworx does.

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 gives an explicit selection rule: 'Use it exactly like ask_pipeworx when you want the newest routing' and names the stable counterpart as the alternative. It also notes that when no candidate is active it currently matches ask_pipeworx exactly, removing ambiguity about current behavior.

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