router_firewall_status

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

Annotations already declare readOnlyHint=true and idempotentHint=true, and the description reinforces this with 'read-only summary.' It adds useful behavioral context by specifying 'from UCI,' clarifying that the tool returns configuration data rather than live firewall state. It also states the scope as a 'summary' rather than exhaustive detail, which goes beyond annotations.

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, front-loaded sentence that states the action and resource immediately. Every word contributes value, listing the specific firewall components covered without waste. It is highly scannable and appropriately concise.

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 simple, parameterless, read-only tool, the description adequately covers the context by enumerating the expected content areas: defaults, zones, forwardings, redirects, and rules. There is no output schema, so a bit more detail on the response structure could be helpful, but the listed components give an agent a clear expectation of what will be returned.

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 tool has zero parameters, and the input schema is an empty object, so the schema fully covers parameter semantics. According to the rubric, a baseline of 4 applies when there are no parameters. The description does not need to add parameter meaning.

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 uses the specific verb 'Get' and a specific resource: 'read-only summary of firewall defaults, zones, forwardings, redirects, and rules from UCI.' It clearly identifies what the tool does and distinguishes it from siblings like router_nftables_rules or router_security_audit, which serve different firewall-related purposes.

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 implies its usage: when a read-only firewall configuration summary is needed. However, it does not provide explicit when-to-use or when-not-to-use guidance, nor does it mention alternatives such as router_nftables_rules for live/nftables details. No exclusions are stated, so the context is clear but not fully explicit.

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