topai_techstack_fingerprint

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

Annotations already declare readOnlyHint, idempotentHint, and destructiveHint=false, so the closing 'read-only, idempotent' phrase largely restates structured data. The description does add genuine context though: '<50ms' latency, 'Stateless', and the signature count. It stops short of covering failure behavior (unknown domains), rate limits, or output shape, which keeps it at a solid but not rich 3.

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?

Front-loaded with the core purpose and performance claim, then usage and exclusion, all in tight sentences. The trailing 'Stateless, read-only, idempotent inspection' fragment mildly duplicates the annotations, a minor waste in an otherwise efficient definition.

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?

With no output schema, the description usefully implies the return content by enumerating the technology categories it reports. It is complete enough for a stateless single-input inspection tool, though it never states the output structure or error handling.

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% and the single 'domain' parameter is already documented with examples ('gymshark.com', 'vercel.com'). The description adds no format or normalization guidance beyond what the schema provides, so the baseline 3 applies.

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?

States a specific verb and resource ('Fingerprints a web domain') with scope (70+ signatures) and enumerates what it identifies (CMS, e-commerce, analytics, CDN, frontend frameworks). It also names the sibling it is not for, letting an agent distinguish it from topai_company_enrichment without opening schemas.

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?

Gives an explicit 'Use when' triggering condition, concrete detection examples (Shopify, Stripe, HubSpot, Next.js, Cloudflare), and a 'Do not use when' exclusion that routes to the specific alternative topai_company_enrichment. When/when-not/alternative are all present.

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