tldr

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

No annotations exist, so the description bears full weight. It discloses fetching up to 500KB, stripping HTML via BeautifulSoup, and a cost of $0.01 USDC. No destructive behavior is implied. It could mention auth or rate limits, but the transparency is good for a simple 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?

Three sentences each adding value: main action, technical detail, usage and constraints, and cost. Front-loaded with purpose, no wasted words. Excellent conciseness.

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 tool is simple but the description covers purpose, behavior, constraints, use cases, and cost. It doesn't specify error handling (e.g., if both parameters provided) or output format details beyond '3-5 bullets,' but given no output schema, this is nearly complete.

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% with each parameter described. The description adds the mutual exclusivity rule 'Exactly one of text or url' and context for the URL parameter regarding size limits. This adds meaningful guidance 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 states the tool summarizes a URL or pasted text into 3-5 concise bullets, with specific verb and resource. It includes details like fetching up to 500KB and stripping HTML, and is distinct from siblings like 'roast' or 'decode_tx'.

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 description provides explicit use cases: 'research distillation, link-rot insurance, agent reading lists.' It also states the mutual exclusivity constraint 'Exactly one of text or url.' However, it does not name alternatives or specify when not to use the tool, though no direct alternative exists among siblings.

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