List CDN firewall rules

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

Annotations already declare readOnlyHint=true and openWorldHint=true, and the description's '[READ]' marker merely repeats that. It adds no behavioral context beyond the annotation: no mention of pagination, result ordering, filtering, or auth requirements for a list endpoint that queries a remote CDN API.

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 a single short line with the read intent front-loaded and no wasted prose, but the brevity is under-specification rather than tightness – the single sentence omits information the agent needs (collection scope, pagination).

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 list endpoint with no output schema, no pagination metadata, and no sibling differentiation, the definition is thin. An agent cannot tell how many rules come back, whether results are paged, or when this should be preferred over the other firewall tools.

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?

Schema coverage is 0%, so the description must carry parameter meaning. The endpoint template does show that domain is a path parameter and is required, which is genuinely useful, but nothing about format or scope is added; the schema's regex pattern is the only remaining documentation.

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 maps the tool to an HTTP call (GET /domains/{domain}/firewall/rules) and the CDN Go SDK method FirewallRulesIndex, which disambiguates this as a read/list of firewall rules. However, it never states in plain terms what it retrieves or how it differs from siblings like get_firewall_rule, create_firewall_rule, or reprioritize_firewall_rules; the reader has to infer the collection semantics from the name alone.

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?

There is no when-to-use or when-not-to-use guidance. Nothing tells the agent to pick this over get_firewall_rule for a single rule or over invoke_cdn_api for a raw call. The '[READ]' tag hints at intent but is not a usage guideline.

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