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

With no annotations present, the description carries the full behavioral burden and does disclose key traits: the vote is immutable, advisory, and safely retryable. It does not mention side effects, prerequisites, or error behavior, but the two most decision-relevant behaviors are made explicit.

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 no filler, front-loading the core action and then adding the most important behavioral caveat. 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?

For a simple two-parameter tool, the description is minimally adequate, but there are clear gaps: it does not explain what option_index refers to, what happens on success or failure, or whether the poll must be open. The immutability and retry-safety notes help, but the absence of parameter context and any return/error information makes it incomplete.

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%, and the description provides no explanation of 'id' or 'option_index'. An agent must guess that 'id' identifies the poll and that 'option_index' selects an option; the description adds no parameter-level meaning beyond the bare schema.

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 uses a specific verb ('Cast') and resource ('vote'), and adds meaningful qualifiers ('immutable', 'advisory') that distinguish it from poll-management siblings like create_poll and close_poll. Even without naming the poll explicitly, the action is unambiguous and easy to separate from other tools.

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 use this tool versus alternatives such as answer_question, close_poll, or set_question_status. The only contextual hint is the tool name itself, and the idempotency note is about retry safety rather than usage conditions.

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