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

Annotations already declare readOnlyHint=false, idempotentHint=true, destructiveHint=false, and openWorldHint=false, so the safety/idempotency profile is covered. The description adds the 'local software evidence only' scope and lists the result components, but it never discloses that the schema implies a priced job submission (max_total_price, idempotency_key) or any async/return-timing behavior, so it contributes only moderate insight.

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 Problem/Input/Result/Limits labeling front-loads the purpose and is easy to scan with no wasted wording. It is appropriately sized for a single-purpose classification tool.

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?

An output schema exists, so return values need not be described, and the description does list the result components. However, for a tool whose schema includes pricing ceilings and idempotency keys inside a nested request object, the definition omits any explanation of the request payload structure, leaving a real gap for correct invocation.

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 0% across four required parameters (request, schema_version, idempotency_key, max_total_price), and the description only loosely gestures at 'Input: JSON with operation, phase context.' It never names or explains idempotency_key, max_total_price, or schema_version, so it fails to compensate for the documentation gap.

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 (classify) and a well-scoped resource (a supported two-qubit operation) along with the classification criterion (bounded local-equivalence class). It does not, however, differentiate itself from the closely-named sibling classify_two_qubit_operation, leaving the agent to infer the distinction from the phrase 'local-equivalence'.

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 'Limits' line gives a scope boundary (local software evidence only; 2 qubits), which is useful context, but there is no explicit when-to-use guidance and no mention of alternatives such as classify_two_qubit_operation or check_quantum_circuit. The agent must guess when this tool is preferred.

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