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

With no annotations, the description carries the burden. It does add useful behavioral facts: the space is not searched, and non-integer/float inputs are refused. It omits what the verification returns, how failures are reported, and any length/exactly-one-1 validation behavior beyond the implicit constraints.

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?

Four short clauses, all front-loaded and essentially waste-free; the identifier, constraint, and refusal rule each earn their place. The telegraphic fragment style is efficient but slightly reduces readability.

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 two-parameter verifier with no output schema and no annotations, the description covers input shape and one refusal case but says nothing about the return value or pass/fail signal, which an agent must know to use a verifier correctly.

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%, so the baseline is 3. The description restates the oracle format (0/1 string length 2..8) and the marked constraint, but adds no syntax beyond the schema, and the phrase 'marked is the unique 1-index' is ambiguous against the schema's explicit 0-based definition.

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+resource ('Grover presented-oracle verifier') and the 'QC-002' identifier pins the exact variant, which clearly separates it from siblings like verify_amplitude_amplification or verify_deutsch_jozsa. The phrasing is terse and jargony, so an agent unfamiliar with 'presented oracle' still has to infer the semantics.

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?

'Does not search the space' implies this is a checker applied to a supplied oracle rather than a solver, which is the key usage distinction. However, it never states when to call this versus the many other verify_* siblings, nor any prerequisites.

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