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

Annotations already declare destructive=true, idempotent=false, openWorld=true, so the safety profile is covered structurally. The description still adds real value beyond that: it spells out that all data is lost, that the order is closed when this was the last item, that canDelete is required, and that the operation is a two-step flow. Missing only failure/partial-failure behavior.

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?

Front-loaded with the destructive effect and densely packed with prerequisites in a few clauses; little waste. The trailing bracketed account/key note is slightly tacked-on but relevant.

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 destructive mutation with no output schema, the description covers effect, permission requirement, and flow, with annotations handling reversibility and idempotency. The remaining gap is distinguishing this tool from gpucloud_delete_server, which an agent selecting between destructive siblings would want.

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 the two parameters are already documented, giving a baseline of 3. The description earns a bump by explaining the two-step flow, which is what makes the confirmationToken parameter necessary and ties it to a prior call.

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 resource plus its side effects: destroys the server, loses all data, and closes the order when it was the last item. It references gpucloud_delete_server as a similar operation, but does not clearly explain how cancel differs from delete, so the distinction an agent would need is only implied.

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?

Gives prerequisites (needs canDelete, permission servers:delete, account and MCP key) and notes the two-step flow, which is useful context. However it never says when to pick this over gpucloud_delete_server or gpucloud_cancel_reservation, so the routing decision is left to inference.

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