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

Annotations declare readOnlyHint=true, but the description states 'Browser actions may change the live page when interactive actions are enabled,' implying a write/modification capability. This directly contradicts the read-only annotation. Additionally, the description does not reconcile this contradiction, leaving the agent uncertain about side effects. Per the rubric, a score of 1 is required due to the annotation contradiction.

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 moderately long but well-structured into four logical paragraphs: purpose, alternatives, options, and caching caveats. It front-loads the primary purpose in the first sentence. Some redundancy exists (e.g., repeated mention of 'known page'), but for a tool with 22 parameters, the length is justified and every paragraph serves a distinct informational goal.

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 tool's complexity (22 params, no output schema, sparse annotations), the description covers a lot: usage context, format selection guidance, alternative tools, caching behavior with maxAge, and a caveat about staleness. It also states what is returned ('selected content formats and page metadata'). It is not perfect—return value details are minimal and the readOnly contradiction undermines completeness—but overall it is rich and situationally useful.

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 0%, so the description must compensate for the 22 undocumented parameters. It does add meaningful semantics for key params like maxAge ('Set maxAge: 0 to force a live fetch'), formats (markdown vs JSON), and option categories like main-content filtering and PII redaction. However, many parameters (proxy, location, mobile, profile, screenshotOptions, etc.) remain unexplained, and the generic 'Options include' phrase does not fully cover the breadth. This is adequate but leaves clear gaps.

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's function: 'Retrieve and extract content from one supplied URL through Firecrawl.' It names a specific verb-resource pair, differentiates from sibling tools by noting this operates on a known page while firecrawl_crawl handles sets of pages and firecrawl_map/firecrawl_search discover URLs, and enumerates concrete output formats (markdown, HTML, screenshots, JSON). This is specific and unambiguous.

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 explicitly states when to use the tool: 'Use this when the request identifies a page and needs its content or defined fields.' It also provides clear alternatives: for a set of pages use firecrawl_crawl, and for discovery use firecrawl_map or firecrawl_search. This gives the agent explicit decision criteria relative to sibling tools.

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