Set Firewall Rules

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

Annotations already declare destructiveHint=false and idempotentHint=true. The description adds the key insight that the operation replaces all existing rules (not appends), which is consistent with the name. However, it does not elaborate on side effects, permissions required, or the fate of old rules beyond replacement. Given annotation coverage, the description provides minimal additional value.

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 a single, clear sentence with no extraneous words. It is front-loaded with the key action ('Replace all rules') and is optimally concise for its purpose.

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?

The description is complete enough given the tool's simplicity and the rich schema/annotations. It conveys the core operation. However, it could briefly mention that this is a full replacement (overwrite) to avoid ambiguity with append-like operations. Despite that, it is nearly complete.

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 description coverage is 100%; both 'id' and 'rules' have detailed schema descriptions. The tool description adds no further parameter context. Since schema already documents parameters adequately, a baseline score of 3 is appropriate.

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 clearly states the action: 'Replace all rules of a firewall with a new set of rules.' It specifies the verb (replace) and resource (firewall rules), and distinguishes from sibling tools like 'hetzner_apply_firewall' (which applies to servers) and 'hetzner_update_firewall' (likely for other attributes).

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?

The description provides no guidance on when to use this tool versus alternatives. It does not state when not to use it, nor does it mention the relationship to other firewall-related tools like 'hetzner_get_firewall' or 'hetzner_update_firewall'. Users must infer usage from the tool name alone.

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