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

No annotations exist, so the description carries the full disclosure burden, and it does very little. It does not say whether this performs a live network fetch, what happens when robots.txt is missing or unreachable, whether it is rate-limited or read-only, or how the allow/deny result is presented.

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?

A single eight-word sentence with the resource and action front-loaded and no filler. It is efficient, though its brevity borders on under-specification rather than true conciseness.

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 and no annotations, so the description is the only source of information about behavior and results, and it omits both. For a tool that performs a network-dependent lookup and returns a crawler allow/deny result, more context is needed.

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?

There is one parameter, 'domain', with 0% schema description coverage, and the description adds no format detail such as whether a bare domain, hostname with port, or full URL is expected. With the schema silent, the description should have compensated but does not.

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 pairs a specific verb ('Check which ... are allowed') with a specific resource (robots.txt / AI crawlers), so the tool's job is unambiguous. It does not need to distinguish itself from siblings like dns_lookup or security_headers, since none of them overlap with robots.txt AI-crawler inspection.

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?

Usage is implied by the purpose: call it with a domain when you want to know which AI crawlers that site permits. However, there is no explicit when-to-use/when-not guidance, no mention of prerequisites (site must be reachable, robots.txt must exist), and no alternative tools named for related checks.

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