Build POP chain

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

Beyond the annotations (readOnlyHint=false, openWorldHint=true, destructiveHint=false), the description reveals that unknown parameter names are tolerated with warnings (fail-forward), that results carry an 'unverified' experimental marker, and that nodes are wired under a specified `parent`. These are useful behavioral details not encoded in 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 roughly 100 words, front-loaded with the core purpose, and every sentence earns its place: structure, defaults, multi-input handling, experimental status, and a practical tip. There is no redundant filler.

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 tool with 77 POP types and multi-input wiring, the description covers the essential behavioral model, wiring semantics, failure mode (warnings), and result marker. It does not describe the return value structure or re-run/overwrite behavior, but the annotations and schema mitigate those gaps. Overall it is a solid, near-complete description.

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 coverage is 100%, so the baseline is 3, but the description adds meaning by stating that per-kind safe defaults are applied before user params and that unknown names become warnings. This goes beyond the schema's generic 'Par overlay' explanation and helps the agent understand how to handle arbitrary params.

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 a specific verb+resource: 'Declarative Layer-2 builder for an ordered POP (Point OPerator) chain.' It clearly distinguishes itself from sibling tools like build_chop_chain by explicitly targeting POPs, and the chain-building mechanism is precisely described.

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 provides concrete usage instructions: pass a `chain` list, each entry wired output 0 → input 0 of the next, with `extra_inputs` for multi-input POPs, and a tip to end with `null_pop`. However, it does not explicitly contrast with alternative tools or state when not to use it, so it lacks explicit exclusions.

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