Does the description clearly state what the tool does and how it differs from similar tools?
The description 'Short catalog of common HTTP status codes' states a clear subject (HTTP status codes) and genre (catalog), so an agent can tell it is a lookup/reference tool rather than, say, a client that makes requests. However, it does not explicitly differentiate it from the sibling tools (citation, compatibility, etc.), and the name 'status-catalog' is close to the description, leaving some ambiguity about whether it returns codes, descriptions, or both.
Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.