Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the burden of disclosing behavior. It explains that setting include_content to true returns the full HTML content, which is a useful behavioral detail. However, it does not mention read-only nature, side effects, or error conditions. It adds some value but is not rich in transparency.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.