extract

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

No annotations are present, so the description carries full burden for behavior. It states 'extract structured data', implying a read-only parse, but does not disclose whether the operation is safe (e.g., read-only), what format the output takes, or any rate limits or authentication needs. The minimal description leaves significant behavioral gaps.

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 extremely short (5 words) but under-specified. Conciseness should not come at the cost of omitting critical information. It reads as incomplete rather than efficient.

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?

Despite having an output schema, the description does not leverage it to explain return values. The tool is a structured data extraction endpoint with complex behavior (url parsing, kwargs), but the description fails to cover error conditions, supported URL types, or expected kwargs format. Incomplete for a tool with two required parameters and no schema annotations.

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 0%, and the description provides no explanation for either parameter. 'kwargs' is entirely opaque; its type and role are undefined. This forces the agent to guess or fail.

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?

Description states 'Extract structured data from a URL', which is a clear verb and resource. However, it does not differentiate from siblings like 'fetch' or 'scrape', which might also retrieve data from URLs. The phrase 'structured data' implies parsing but is not explicit about the output format.

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?

No guidance is provided on when to use 'extract' versus alternatives like 'fetch', 'scrape', or 'search_free'. There is no mention of prerequisites, context, or exclusions, leaving the agent to infer usage without support.

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