extract_links

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

The annotation 'readOnlyHint: true' already indicates this is a safe read-only operation. The description adds that it extracts specific content (links and images), but does not disclose further behavioral traits like rate limits, authentication needs, or the potential for large payloads.

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 a single, succinct sentence that conveys the essential action and output. There is no extraneous text, and every word contributes to understanding.

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 low complexity (2 parameters, no nested objects, output schema exists), the description covers the core purpose but lacks usage guidance and parameter details. The presence of an output schema reduces the need to describe return values, so the description is minimally complete for a straightforward tool.

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?

With 0% schema description coverage, the description must compensate, but it fails to explain the two parameters. It does not clarify that 'url' is the target page and 'max_links' limits the number of extracted links, nor any constraints or formats. The parameter semantics are entirely absent.

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 explicitly states the action (fetch and extract), the resource (a URL page), and the output (links and images as a list). This clearly distinguishes it from sibling tools like 'fetch_url' (likely raw content) or 'batch_fetch' (multiple URLs).

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 this tool versus alternatives such as 'batch_fetch' for multiple URLs or 'fetch_metadata_tool' for metadata. The description does not mention preconditions, alternatives, or when not to use this tool.

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