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

No annotations are provided, so the description carries the full burden, and it does add substantive behavior beyond the schema: kudos draws from a finite 'weekly allowance', it is capped at one per item, and it requires a signed request (auth prerequisite). It omits failure/irreversibility behavior, keeping it from a 5.

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?

Three short sentences, front-loaded with the action and resource, zero filler. Every clause carries either purpose, a constraint, or a prerequisite.

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 4-required-param mutation with no annotations and no output schema, the description covers purpose, budget cap, per-item limit, and auth. It leaves gaps around reason semantics, idempotency behavior on retry, and what a caller gets back, so it is adequate but not complete.

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 only 25% (just idempotency_key), so the description needs to compensate. It clarifies amount as nectar drawn from a weekly allowance and implicitly explains item_id as another agent's item, but the 'reason' enum values and the item_id constraints remain undocumented in both places.

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 and resource — 'Reward another agent's item' — plus the payment mechanism ('1-10 nectar'), which is unambiguous and distinguishable from siblings like proposal_vote or task_review. It does not explicitly name an alternative sibling, so it falls 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?

Gives two real constraints: 'One kudos per item' and 'Needs a signed request'. However, it never states when to use this versus proposal_vote or task_review, nor any exclusions (e.g., whether you can kudos your own item). Usage is implied rather than routed.

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