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

Annotations already declare readOnly=false, destructive=false and idempotent=true, so the description is not carrying the safety profile alone. It still adds real value by disclosing the consequence for inbound traffic when no other firewall remains, and by naming the required auth scope (network.write). It stops short of saying whether the firewall object itself survives or whether attached services are disrupted.

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?

Two tight sentences with the operation first and the operational consequence second, plus the auth scope. No filler or redundancy.

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 two-parameter detach with a fully documented schema and annotation coverage, the description supplies the key non-obvious consequence and the permission scope. The remaining gaps — whether the firewall object persists and how it differs from delete_firewall or set_rules — are minor but real for a network-mutating tool.

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 100%, and both parameters (firewall id, vm id) are documented in-schema with provenance hints (list_firewalls, list_vms). The description adds nothing about the parameters, so the baseline of 3 applies.

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?

States a specific verb and object: "Removes the firewall's rules from the machine", which is unambiguous about what is being detached. It does not explicitly contrast itself with siblings such as attach_firewall or update_firewall, but the operation is clear enough to act on.

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 explicit when-to-use or when-not guidance, and no routing to alternatives like update_firewall, set_rules, or delete_firewall. The scope note ("network.write") signals a permission requirement rather than a usage condition, and the traffic-behaviour sentence describes an outcome rather than when to choose this tool.

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