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

With no annotations supplied, the description carries the behavioral burden and does so fairly well: it discloses cost (free), latency (<400ms), audit depth (47 checks), and the specific return artifacts, including conditional behavior ('pre-built teardown URL if indexed'). Gaps remain on rate limits, failure behavior for non-resolving or non-SaaS domains, and whether the call has any side effects.

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?

One dense sentence that front-loads the action and then lists outputs; nearly every clause carries information. It is long and list-heavy, which makes it slightly hard to scan, but there is no filler to cut.

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?

No output schema exists, and the description compensates by enumerating the returned fields and latency characteristics, which is what an agent needs to plan around the result. Remaining gaps — error modes, rate limits, and input normalization — are minor for a one-parameter read-style audit.

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% for the single 'domain' parameter, so baseline is 3. The description adds only modest meaning beyond the schema — restricting targets to 'public B2B SaaS domain' — and does not address format concerns such as scheme prefixes, subdomains, or trailing paths.

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 opens with a specific verb and resource — 'Run a free real-time 47-check edge HTTP audit on any public B2B SaaS domain' — and enumerates the concrete artifacts returned (status matrix, missing signals, teardown URL, starter /llms.txt). It never names the sibling tools, so the agent must infer that this is the probe/score step rather than the generate, lookup, or reserve steps.

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?

Scope is implied rather than instructed: 'any public B2B SaaS domain' hints at admissibility, and 'free' hints at cost, but there is no explicit when-to-use, when-not-to-use, or routing to lookup_saas_benchmark_teardown / generate_starter_aso_router. The agent can guess the workflow position but is given no stated alternatives.

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