list_firewall_rules

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

With no annotations, the description carries the burden of disclosure. It states the return type (list) and the filtering behavior, but does not mention permissions, pagination, or error handling. The added network filter context is slightly useful but minimal.

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 standard docstring with a concise summary, Args, and Returns sections. It is front-loaded and clear, though slightly repetitive (e.g., 'optionally filtered by network' appears in both summary and Args). No unnecessary fluff.

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 list tool with two parameters, the description covers what it does, parameters, and return value. It does not discuss edge cases or errors, but given the simplicity and lack of an output schema, it is sufficiently 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?

The schema has no descriptions (0% coverage), so the description compensates by explaining each parameter: 'The ID of the GCP project' and 'Optional network name to filter firewall rules by'. This adds meaning beyond the bare parameter names and types.

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 'List firewall rules in a GCP project' with an optional network filter, using a specific verb and resource. This distinguishes it from sibling tools like list_vpc_networks or create_firewall_rule.

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 when to use (listing firewall rules, optionally filtered by network) but does not provide explicit exclusions or alternative tool references. Context is clear but no direct comparison to siblings.

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