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

With no annotations at all, the description carries the full burden. It does disclose two useful traits — the operation is free ("Free") and results are ordered newest first with vote tallies included — but says nothing about pagination, result caps, or authorization beyond the api_key parameter.

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 key attributes front-loaded (what you get, then ordering, then cost). The "Same as GET /v1/polls" clause is only marginally useful to an MCP agent but costs little.

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?

An output schema exists, so return values need no explanation, and the single optional parameter keeps complexity low. Still missing are the scope of "your" (personal vs team), any result limit, and whether closed polls are included — details an agent would want before calling it.

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?

There is a single optional api_key parameter with 0% schema description coverage, and the description never mentions it or how authentication is expected. Since the param is optional and likely handled globally, this is a minor rather than severe 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 names the resource ("your package votes"), the ordering ("newest first") and the payload ("results so far"), which is a clear read/list operation. It does not differentiate itself from nearby siblings like get_poll, next_poll, or vote_poll, so it stops short of a 5.

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?

There is no explicit when-to-use guidance and no exclusions. "Same as GET /v1/polls" only helps an agent that already knows the HTTP API; it gives no criteria for choosing list_polls over get_poll or next_poll.

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