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

With no annotations provided, the description carries the full burden of behavioral disclosure. It does disclose the output contract—'return the next question or the final verdict'—which is helpful. But it stays silent on side effects (whether the answer is recorded or state advances), idempotency, validation of the question id, and behavior on an out-of-range choice index. For a state-advancing tool, this is a notable but not severe gap.

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 22-word sentence that is front-loaded with the inputs and ends with the output. There is no fluff, no repetition of the title, and no restating of schema contents. Every word earns its place.

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?

The tool has only 2 parameters, no output schema, and no annotations, so the description must cover the essentials. It names the two possible returns (next question or final verdict) but not their structure, and it does not address error behavior or invalid inputs. For a simple tool in a checker trio this is workable but leaves the agent to infer the response format.

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 must compensate, and it does: it clarifies that question is an id, not a question string, and that choice is an index into the option list. The schema alone only offers type/minLength and type/minimum. The description stops short of specifying how choice aligns with the option list or confirming 0-based indexing, leaving a partial 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?

The description states a clear function: take a question id and a chosen option index, then return the next question or the final verdict. This distinguishes it from siblings like checker_start (which likely initiates the flow) and checker_tree (which likely shows the overall structure), though it does not explicitly contrast itself. The verb 'return' is slightly passive, but the input→output contract is unambiguous.

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 usage context is implied: the agent should call this when it has a question and a choice to advance one step in the flow. However, there is no explicit when-to-use vs when-not-to-use guidance, and no alternatives are named. The sibling names hint at the flow shape, but the description leaves the selection decision to inference.

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