Get CDN firewall rule

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

Annotations already declare readOnlyHint=true and openWorldHint=true; the '[READ]' tag merely echoes the read-only hint and adds no new context such as auth requirements, error behavior for unknown ids, or rate limits. It does not contradict the annotations, but adds minimal value beyond them.

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?

It is very short with no padding, which is good, but what space it uses is spent on a REST path rather than on information the agent needs. Concise without being informative.

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 retrieval tool with no output schema, the description should at least signal what is returned (rule fields, ordering, not-found behavior). Neither the description nor an output schema covers returns, leaving the agent under-informed.

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?

With schema description coverage at 50% (only rule_id is documented, and only with 'never invent'), the description should compensate by clarifying the domain/rule_id contract, but it provides no parameter meaning at all. It leaves the undocumented domain parameter entirely to the schema.

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 text is essentially a restatement of the name plus the REST path: 'GET /domains/{domain}/firewall/rules/{id}' tells the agent nothing the name 'get_firewall_rule' didn't already convey. It does not distinguish this tool from siblings like list_firewall_rules or get_firewall_settings.

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?

No when-to-use guidance, no prerequisites, no alternatives named. The agent must infer that this retrieves a single rule versus list_firewall_rules purely from the name.

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