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

With no annotations present, the description carries the full disclosure burden. It does add genuinely useful non-schema context — the tool is paid, costing $0.004 USDC on Base via x402 — which is exactly the kind of behavioral fact structured fields do not convey. However, it says nothing about output format, outline depth, length, or failure behavior, leaving significant gaps for a generative tool.

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?

Two short sentences with the core action front-loaded and the cost disclosure following. No filler or repetition, though the pricing sentence is somewhat tangential to correct invocation.

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 generative tool with no annotations, no output schema, and an opaque single parameter, the description should explain input shape and expected output structure. It covers the action and the cost but not how to format the payload or what the returned outline looks like, so an agent cannot call it confidently without guessing.

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?

There is a single parameter, "payload", with 0% schema description coverage and a bare default of "{}". The description only obliquely hints at its contents ("a topic or document") without stating whether it is raw text, a topic string, a URL, or a JSON envelope — a real ambiguity given the stringified-JSON default. It adds marginal meaning over the schema rather than compensating for the coverage gap.

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 gives a specific verb plus resource: "Build a structured outline" and names its input sources (a topic or a document). An agent can tell this is an outlining/structuring tool rather than a summarizer or rewriter. It stops short of explicitly distinguishing itself from siblings like summarize or rewrite.

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?

There is no explicit when-to-use guidance, no exclusion rules, and no named alternative among the many text-processing siblings (summarize, rewrite, keywords, classify). Only the implicit hint that the input may be either a topic or a document is offered, leaving the agent to infer selection criteria.

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