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

With no annotations and no output schema, the description carries the full burden of behavioral disclosure, but it only describes the happy path (return next question or final verdict). For a tool named checker_answer in a verification flow, it says nothing about whether the answer is validated, what happens on an incorrect or unknown question, whether repeated submissions are idempotent, or what the final verdict path looks like. Scoring is low because this is a verification-class tool with no verification semantics disclosed.

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?

One sentence, no fluff, and the input contract is front-loaded before the output. The structure is easily scannable and the sentence earns its place. It loses a point only because the brevity leaves the behavioral gaps noted above, making the description feel slightly under-specified rather than efficiently complete.

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 verification step with no annotations, no output schema, and 0% parameter coverage, the description is incomplete. It covers the normal calling convention but omits failure modes, verification/retry semantics, state prerequisites, and the meaning of the returned verdict — exactly the details an agent needs when invoking a state-machine step 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 description coverage is 0%, so the description is the only source of parameter meaning. It does map both parameters clearly: question is a question id and choice is the index of the chosen option. However, it omits index base (schema's minimum 0 implies zero-based), ID format, and acceptable value ranges beyond the schema's minimum.

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?

The description names a specific verb (return) and resource (next question or final verdict), and the phrase 'next' and 'final verdict' position this as the step-advancing tool within the checker_ family, distinguishing it from checker_start (which begins the flow) and checker_tree (which views it). It earns a 4 rather than 5 because it never explicitly names the sibling tools or their relationship, leaving the differentiation to inference.

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 description gives no guidance on when to call this tool versus checker_start or checker_tree. It neither states a prerequisite (e.g., must call checker_start first) nor excludes cases (e.g., use checker_tree to view the whole flow). A capable agent can infer the mid-flow usage from the title, but the description itself provides no directive.

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