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

With no annotations, the description carries the behavioral burden and does well: it discloses that the result is another user's poll, returns options in a caller-defined order, omits counts, returns null when none is waiting, and is free. It still lacks details about authentication, rate limits, or whether options order is controlled by the server or caller.

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?

The description is compact and front-loaded: it identifies the resource, the key behavior (null when none), the cost, and the underlying endpoint in three efficient sentences. There is no padding.

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 read tool with an output schema, the description is largely complete: it covers the exclusion behavior and the empty-result case. The remaining gap is the undocumented api_key parameter and the lack of any authentication context.

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 coverage is 50%: skip is documented in the schema and referenced in the description as polls to pass over, but api_key is undocumented in both schema and description. The description adds little beyond the existing skip description and does not compensate for the api_key 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 specific resource and scope: the next poll from another user that is waiting for your vote, excluding skipped polls. It differentiates from generic list/get tools by emphasizing the 'next waiting' semantic, though it does not explicitly name sibling alternatives.

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?

Usage is implied by 'waiting for your vote' and the skip behavior, so an agent can infer this is for fetching a poll to vote on. However, it does not explicitly compare against alternatives like list_polls, get_poll, or vote_poll, nor does it state when not to use this tool.

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