Find Host By Domain

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

With no annotations, the description carries the full behavioral burden. It usefully discloses that the operation is read-only, that it joins hosts to their assigned certificates, and that it returns compact summaries with certificate details; missing details include auth requirements or behavior when wildcard matches are broad.

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?

The description is three compact sentences, front-loads the core purpose, and every sentence adds relevant information without redundancy.

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?

For a read-only lookup with an output schema, the description gives sufficient completeness: it identifies the resources searched, matching behavior, read-only nature, and what kind of result to expect. Return value details are appropriately left to the output schema.

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?

The single domain parameter has full schema description coverage, so the baseline is 3. The description mentions exact or wildcard matching, but that meaning is already present in the schema and it adds no extra syntax or formatting guidance.

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 names a specific verb and resource set: finding proxy hosts, redirection hosts, and certificates by domain. It clearly scopes the lookup to exact or wildcard domain matching, but it does not explicitly differentiate itself from siblings such as get_proxy_host or list_proxy_hosts.

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 domain-based lookup and read-only framing, but the description does not state when to prefer this tool over alternatives like get_proxy_host, list_proxy_hosts, or list_certificates.

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