APIbase

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

No annotations provided, so description carries full burden. It successfully discloses Chrome-based rendering engine, JS-heavy SPA waiting behavior, and the fact that it returns a hosted image URL. Missing error handling scenarios, rate limits, and URL persistence details (temporary vs permanent links).

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?

Extremely efficient two-sentence structure. Front-loaded with core function, followed by capability list, ending with implementation context (ApiFlash). Zero redundant words; every clause conveys unique information about functionality or behavior.

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 9 parameters with full schema coverage and no output schema, the description adequately covers the return format (image URL) and explains the rendering behavior. Reasonably complete for a screenshot utility, though would benefit from mentioning error handling (404s, timeouts) or URL expiration details.

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 100%, establishing baseline 3. Description adds valuable semantic context by grouping parameters into functional features: 'custom viewport' (width/height), 'full-page capture' (full_page), 'ad blocking' (no_ads), and 'cookie banner removal' (no_cookie_banners). Explains the purpose of delay/wait_until through the JS-heavy SPA context.

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?

Clearly states the core action ('Take a screenshot of any URL') and return type ('returns image URL'). Mentions Chrome-based rendering and ApiFlash, which distinguishes it from sibling screenshot tools like web.scrape.screenshot. However, it does not explicitly differentiate from similar tools by naming alternatives or contrasting use cases.

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?

Implies usage contexts through feature descriptions ('Waits for JS-heavy SPAs to load' suggests use with React/Angular sites, ad blocking for clean captures). However, it lacks explicit 'when to use vs when not to use' guidance and does not reference sibling alternatives like web.scrape.screenshot or document.convert.web_to_pdf.

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