What is the best way to know if a tool's crawl will respect my robots.txt directives?

A common assumption in technical SEO is that tools which offer site crawling will, by default, adhere to the directives laid out in a site's `robots.txt` file. In my experience orchestrating large-scale crawls for infrastructure monitoring and observability, this assumption is dangerously flawed when applied to SEO tooling. The behavior is highly vendor-dependent and often obscured behind feature labels or rate-limiting logic.

The core issue is that many SEO tools are optimized for *discovery* and *coverage auditing*, not for perfectly emulating a search engine crawler's obedience. Their primary goal is to give you data, which can create a perverse incentive to circumvent blocks that might hide "important" pages from an audit. To determine if a tool will truly respect your `robots.txt`, you must adopt a verification methodology similar to validating a new monitoring agent's data collection scope.

Here is a methodical approach I recommend:

**1. Controlled Environment Testing**
* **Set a definitive trap.** Place a `Disallow` directive for a path you can absolutely monitor. For example:
```
User-agent: *
Disallow: /test-crawl-verification/
```
* **Instrument the trap.** Within the disallowed path, deploy a resource that is trivial to track. This could be:
* A unique, publicly accessible URL that returns a specific HTTP status code (e.g., 200) and contains a unique string in its `