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

Annotations already mark it as a non-read-only, non-idempotent, non-destructive, closed-world write. The phrase 'auditable ballot session' adds that votes are recorded for audit, but the description does not say what gets created, whether votes are revocable, or whether auth/session prerequisites are required.

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?

One front-loaded sentence with no filler. It is appropriately sized for the definition, even if sparse.

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?

A non-idempotent write with no output schema and only a deferred body contract. The description omits session prerequisites, vote payload shape, and auth context, leaving invocation dependent on an external schema.

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 100% and the only parameter's description points to an OpenAPI schema resource. The tool description adds no body field, format, or session-id detail, so the high-coverage baseline of 3 applies.

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 'Cast' and resource 'vote' with scope 'inside an auditable ballot session'. Distinguishes from generic ballot management, though it does not explicitly name ballot_session as the alternative.

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, when-not, prerequisites, or alternative guidance. 'Inside an auditable ballot session' implies prior session creation but does not state it or route the agent to ballot_session.

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