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

Annotations already declare destructiveHint=true and idempotentHint=true, so the safety profile is covered structurally. The description adds genuinely useful context beyond that: the required scope 'firewall:write', the preconditions (ready server, free GPU Cloud account + MCP key), which the annotations do not express.

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?

A single front-loaded sentence; the core action leads and supporting details are parenthesized/bracketed. It is appropriately sized for a two-parameter delete, with only mild clutter from the trailing account requirement note.

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?

There is no output schema, but a delete tool returns little of consequence, and the annotations plus description jointly cover safety, idempotency, scope, and preconditions. What remains unstated (e.g., whether the rule ID stays valid afterward) is minor.

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%, so both parameters are already documented in the schema, including the 'fw_...' format and the source list tool. The description restates the ruleId origin but adds no syntax or format detail beyond the schema, 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 ('Removes') and resource ('a firewall rule'), and goes further by naming where the ruleId comes from (gpucloud_list_firewall_rules) and the precondition that the server be 'ready'. It is clearly distinguishable from its nearest sibling gpucloud_add_firewall_rule, though the differentiation is implied by the verb rather than stated.

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?

Usage is only implied: the parenthetical pointing to gpucloud_list_firewall_rules hints at the prerequisite lookup step, and 'ready server' hints at a precondition. There is no explicit when-to-use vs when-not-to-use guidance, and no alternatives are named.

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