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

'Read-only' merely restates readOnlyHint=true already declared in annotations, so it adds no behavioral context. Nothing is said about pagination behavior or result shape beyond what the schema already documents, leaving the description with no value beyond structured fields.

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?

Two short sentences with the purpose front-loaded and no filler. The phrase 'Read-only' is redundant with annotations, which is the only wasted words, but overall the text is tight.

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?

With four optional filter parameters, no output schema, and no required params, the description does not explain what an answer record contains or how results are grouped per question. Adequate to invoke the tool, but it leaves return-shape questions unanswered.

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%, with page, per_page, item_key, and response_id all documented in the schema itself. The description adds no parameter meaning (e.g., how item_key or response_id interact), so the baseline 3 is warranted.

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 ('List') and resource ('per-question answer values within form responses'), which distinguishes it from sibling list_form_responses (whole responses) and get_form_response_answer (a single answer). It is clear, though it doesn't explicitly name those siblings.

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?

No when-to-use guidance, no prerequisites, and no mention of the alternatives (list_form_responses, get_form_response_answer). The only implicit signal is 'within form responses', leaving the agent to infer that this is for drilling into answers rather than fetching responses.

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